LeetCode Progress Report

Progress Chart

Detail

Done	ID	Title	Difficulty	Rust Solutions	C++ Solutions
✔	1	Two Sum	★	index_map sort_then_bidirectional_search sort_then_bidirectional_search_2
✔	2	Add Two Numbers	★★	simple
✔	3	Longest Substring Without Repeating Characters	★★	sliding_window sliding_window_2 sliding_window_3
✔	4	Median of Two Sorted Arrays	★★★	binary_search fast_binary_search simplified_binary_search simplified_three_way_binary_search three_way_binary_search wrapping_fast_binary_search
✔	5	Longest Palindromic Substring	★★	brute_force
✔	6	Zigzag Conversion	★★	brute_force
✔	7	Reverse Integer	★★	brute_force
✔	8	String to Integer (atoi)	★★	brute_force
✔	9	Palindrome Number	★	brute_force brute_force_unsafe reverse_half
✔	10	Regular Expression Matching	★★★	dynamic_programming
✔	11	Container With Most Water	★★	two_pointers
✔	12	Integer to Roman	★★	generic specialized_1 specialized_2
✔	13	Roman to Integer	★	parsing parsing_2
✔	14	Longest Common Prefix	★	brute_force
✔	15	3Sum	★★	sort_then_two_sum sort_then_two_sum_short
✔	16	3Sum Closest	★★	two_pointers
✔	17	Letter Combinations of a Phone Number	★★	backtracking
✔	18	4Sum	★★	reduce_to_three_sum
✔	19	Remove Nth Node From End of List	★★	measure_length
✔	20	Valid Parentheses	★	stack stack_2
✔	21	Merge Two Sorted Lists	★	zip zip_2
✔	22	Generate Parentheses	★★	backtracking backtracking_2 backtracking_3
✔	23	Merge k Sorted Lists	★★★	heap
✔	24	Swap Nodes in Pairs	★★	obvious
✔	25	Reverse Nodes in k-Group	★★★	reverse_group reverse_group_2
✔	26	Remove Duplicates from Sorted Array	★	cheating sequential_processing
✔	27	Remove Element	★	cheating sequential_processing sequential_processing_2
✔	28	Find the Index of the First Occurrence in a String	★	cheating kmp naive
✔	29	Divide Two Integers	★★	exponential_check
✔	30	Substring with Concatenation of All Words	★★★	brute_force interleaving_sliding_window_sets sliding_window_sets
✔	31	Next Permutation	★★	find_last_inversion
✔	32	Longest Valid Parentheses	★★★	bidirectional_scan dynamic_programming stack
✔	33	Search in Rotated Sorted Array	★★	binary_search binary_search_2
✔	34	Find First and Last Position of Element in Sorted Array	★★	binary_search binary_search_2
✔	35	Search Insert Position	★	binary_search binary_search_2 binary_search_fast binary_search_fast_2 binary_search_recursive
✔	36	Valid Sudoku	★★	naive single_pass
✔	37	Sudoku Solver	★★★	backtracking_1 backtracking_2
✔	38	Count and Say	★★	iterative
✔	39	Combination Sum	★★	backtracking
✔	40	Combination Sum II	★★	backtracking backtracking_2 backtracking_3
✔	41	First Missing Positive	★★★	pigeonhole
✔	42	Trapping Rain Water	★★★	maximum_on_both_sides stack two_pointers
✔	43	Multiply Strings	★★	naive
✔	44	Wildcard Matching	★★★	match_by_chunks
✔	45	Jump Game II	★★	bfs bfs_single_loop bfs_with_tricks
✔	46	Permutations	★★	backtracking_1 backtracking_2 backtracking_3 heap
✔	47	Permutations II	★★	backtracking_1 backtracking_2 backtracking_3 next_permutations
✔	48	Rotate Image	★★	naive reverse_then_transpose
✔	49	Group Anagrams	★★	sort_word
✔	50	Pow(x, n)	★★	recurse_on_half
✔	51	N-Queens	★★★	backtracking
✔	52	N-Queens II	★★★	backtracking
✔	53	Maximum Subarray	★★	divide_and_conquer dynamic_programming
✔	54	Spiral Matrix	★★	level_by_level rotate_matrix
✔	55	Jump Game	★★	greedy
✔	56	Merge Intervals	★★	greedy greedy_2
✔	57	Insert Interval	★★	binary_search binary_search_2 binary_search_3
✔	58	Length of Last Word	★	manual_reversed_iteration reversed_iteration
✔	59	Spiral Matrix II	★★	layer_by_layer
✔	60	Permutation Sequence	★★★	iterative
✔	61	Rotate List	★★	measure_length
✔	62	Unique Paths	★★	binomial dynamic_programming
✔	63	Unique Paths II	★★	dynamic_programming
✔	64	Minimum Path Sum	★★	dynamic_programming
✔	65	Valid Number	★★★	dfa
✔	66	Plus One	★	clever
✔	67	Add Binary	★	naive
✔	68	Text Justification	★★★	iterative recursive
✔	69	Sqrt(x)	★	binary_search fast_binary_search newtons_method newtons_method_with_f32 newtons_method_with_f64 smart_newtons_method smarter_newtons_method
✔	70	Climbing Stairs	★	dynamic_programming fast_fibonacci_iterative fast_fibonacci_recursive
✔	71	Simplify Path	★★	stack
✔	72	Edit Distance	★★	dynamic_programming
✔	73	Set Matrix Zeroes	★★	two_passes two_passes_2
✔	74	Search a 2D Matrix	★★	binary_search
✔	75	Sort Colors	★★	counting_sort
✔	76	Minimum Window Substring	★★★	sliding_window sliding_window_2
✔	77	Combinations	★★	iterative recursive
✔	78	Subsets	★★	iterative iterative_2 partial_iterative recursive
✔	79	Word Search	★★	recursive
✔	80	Remove Duplicates from Sorted Array II	★★	iterative recursive
✔	81	Search in Rotated Sorted Array II	★★	binary_search
✔	82	Remove Duplicates from Sorted List II	★★	iterative recursive
✔	83	Remove Duplicates from Sorted List	★	iterative recursive
✔	84	Largest Rectangle in Histogram	★★★	stack stack_2
✔	85	Maximal Rectangle	★★★	dynamic_programming use_largest_rectangle_in_histogram
✔	86	Partition List	★★	iterative recursive
✔	87	Scramble String	★★★	dynamic_programming memoized_recursive
✔	88	Merge Sorted Array	★	iterative recursive
✔	89	Gray Code	★★	bit_manipulation dynamic_programming
✔	90	Subsets II	★★	iterative recursive recursive_2
✔	91	Decode Ways	★★	dynamic_programming dynamic_programming_2
✔	92	Reverse Linked List II	★★	iterative
✔	93	Restore IP Addresses	★★	iterative
✔	94	Binary Tree Inorder Traversal	★	iterative morris_traversal morris_traversal_keep_structure partial_iterative recursive
✔	95	Unique Binary Search Trees II	★★	recursive recursive_2
✔	96	Unique Binary Search Trees	★★	catalan_number catalan_number_2 dynamic_programming
✔	97	Interleaving String	★★	dynamic_programming
✔	98	Validate Binary Search Tree	★★	recursive recursive_2 recursive_3
✔	99	Recover Binary Search Tree	★★	morris_traversal
✔	100	Same Tree	★	cheating recursive
✔	101	Symmetric Tree	★	recursive
✔	102	Binary Tree Level Order Traversal	★★	iterative
✔	103	Binary Tree Zigzag Level Order Traversal	★★	iterative
✔	104	Maximum Depth of Binary Tree	★	iterative recursive
✔	105	Construct Binary Tree from Preorder and Inorder Traversal	★★	recursive recursive_cached recursive_smart recursive_smart_2
✔	106	Construct Binary Tree from Inorder and Postorder Traversal	★★	recursive recursive_cached recursive_smart recursive_smart_2
✔	107	Binary Tree Level Order Traversal II	★★	iterative
✔	108	Convert Sorted Array to Binary Search Tree	★	recursive
✔	109	Convert Sorted List to Binary Search Tree	★★	recursive
✔	110	Balanced Binary Tree	★	recursive
✔	111	Minimum Depth of Binary Tree	★	recursive
✔	112	Path Sum	★	iterative
✔	113	Path Sum II	★★	iterative recursive
✔	114	Flatten Binary Tree to Linked List	★★	iterative recursive
✔	115	Distinct Subsequences	★★★	dynamic_programming
✔	116	Populating Next Right Pointers in Each Node	★★		iterative recursive
✔	117	Populating Next Right Pointers in Each Node II	★★		iterative
✔	118	Pascal's Triangle	★	iterative
✔	119	Pascal's Triangle II	★	iterative
✔	120	Triangle	★★	dynamic_programming dynamic_programming_2
✔	121	Best Time to Buy and Sell Stock	★	dynamic_programming
✔	122	Best Time to Buy and Sell Stock II	★★	dynamic_programming
✔	123	Best Time to Buy and Sell Stock III	★★★	dynamic_programming
✔	124	Binary Tree Maximum Path Sum	★★★	recursive
✔	125	Valid Palindrome	★	bidirectional_search
✔	126	Word Ladder II	★★★	bidirectional_search
✔	127	Word Ladder	★★★	bfs bidirectional_bfs naive_bfs
✔	128	Longest Consecutive Sequence	★★	hash_set
✔	129	Sum Root to Leaf Numbers	★★	recursive
✔	130	Surrounded Regions	★★	bfs bfs_2
✔	131	Palindrome Partitioning	★★	find_all_palindromes
✔	132	Palindrome Partitioning II	★★★	dynamic_programming
	133	Clone Graph	★★
✔	134	Gas Station	★★	greedy greedy_2
✔	135	Candy	★★★	tail_recursive
✔	136	Single Number	★	reduce_xor
✔	137	Single Number II	★★	dynamic_programming
	138	Copy List with Random Pointer	★★
✔	139	Word Break	★★	dynamic_programming
✔	140	Word Break II	★★★	dynamic_programming memoized_recursive
	141	Linked List Cycle	★
	142	Linked List Cycle II	★★
✔	143	Reorder List	★★	iterative
✔	144	Binary Tree Preorder Traversal	★	iterative partial_iterative recursive
✔	145	Binary Tree Postorder Traversal	★	iterative iterative_2 recursive
✔	146	LRU Cache	★★	map_to_doubly_linked_list map_to_doubly_linked_list_2 map_to_doubly_linked_list_3
✔	147	Insertion Sort List	★★	iterative
✔	148	Sort List	★★	merge_sort
✔	149	Max Points on a Line	★★★	brute_force
✔	150	Evaluate Reverse Polish Notation	★★	stack
✔	151	Reverse Words in a String	★★	cheating
✔	152	Maximum Product Subarray	★★	dynamic_programming
✔	153	Find Minimum in Rotated Sorted Array	★★	binary_search
✔	154	Find Minimum in Rotated Sorted Array II	★★★	binary_search
✔	155	Min Stack	★★	one_stack
	160	Intersection of Two Linked Lists	★
✔	162	Find Peak Element	★★	binary_search
✔	164	Maximum Gap	★★★	buckets_and_pigeonhole comparison_sort radix_sort
✔	165	Compare Version Numbers	★★	iterator
✔	166	Fraction to Recurring Decimal	★★	hash_map
✔	167	Two Sum II - Input Array Is Sorted	★★	bidirectional_search
✔	168	Excel Sheet Column Title	★	iterative
✔	169	Majority Element	★	boyer_moore_majority_vote
✔	171	Excel Sheet Column Number	★	iterative
✔	172	Factorial Trailing Zeroes	★★	iterative iterative_2
✔	173	Binary Search Tree Iterator	★★	iterative
✔	174	Dungeon Game	★★★	dynamic_programming
✔	179	Largest Number	★★	sorting_1 sorting_2
✔	187	Repeated DNA Sequences	★★	sliding_window sliding_window_2
✔	188	Best Time to Buy and Sell Stock IV	★★★	dynamic_programming
✔	189	Rotate Array	★★	cheating cyclic_replacements triple_reverses
✔	190	Reverse Bits	★	cheating divide_and_conquer iterative
✔	191	Number of 1 Bits	★	cheating iterative iterative_2
✔	198	House Robber	★★	dynamic_programming dynamic_programming_2
✔	199	Binary Tree Right Side View	★★	bfs recursive
✔	200	Number of Islands	★★	bfs dfs recursive_dfs
✔	201	Bitwise AND of Numbers Range	★★	iterative iterative_2
✔	202	Happy Number	★	hash_set two_runners
✔	203	Remove Linked List Elements	★	iterative tail_recursive
✔	204	Count Primes	★★	brute_force sieve
✔	205	Isomorphic Strings	★	direct_address_table hash_map
✔	206	Reverse Linked List	★	iterative recursive
✔	207	Course Schedule	★★	bfs iterative_dfs iterative_dfs_2 iterative_dfs_3 recursive_dfs recursive_dfs_2 recursive_dfs_3
✔	208	Implement Trie (Prefix Tree)	★★	canonical
✔	209	Minimum Size Subarray Sum	★★	sliding_window tail_recursive_sliding_window
✔	210	Course Schedule II	★★	in_degrees in_degrees_2 iterative_dfs iterative_dfs_2 recursive_dfs recursive_dfs_2
✔	211	Design Add and Search Words Data Structure	★★	trie
✔	212	Word Search II	★★★	trie_dfs
✔	213	House Robber II	★★	dynamic_programming
✔	214	Shortest Palindrome	★★★	brute_force kmp
✔	215	Kth Largest Element in an Array	★★	quick_select randomized_quick_select
✔	216	Combination Sum III	★★	recursive recursive_2
✔	217	Contains Duplicate	★	hash_set
✔	218	The Skyline Problem	★★★	divide_and_conquer ordered_map priority_queue
✔	219	Contains Duplicate II	★	index_map sliding_window_hash_set
✔	220	Contains Duplicate III	★★★	sliding_window_buckets sliding_window_ordered_set
✔	221	Maximal Square	★★	dynamic_programming dynamic_programming_2
✔	222	Count Complete Tree Nodes	★	recursive
✔	223	Rectangle Area	★★	normalize
✔	224	Basic Calculator	★★★	recursive_descent stack
✔	225	Implement Stack using Queues	★	slow_pop slow_push
✔	226	Invert Binary Tree	★	recursive recursive_2
✔	227	Basic Calculator II	★★	iterative recursive_descent stack
✔	228	Summary Ranges	★	iterative recursive
✔	229	Majority Element II	★★	boyer_moore_majority_vote
✔	230	Kth Smallest Element in a BST	★★	iterative recursive
✔	231	Power of Two	★	bit_manipulation division enumeration
✔	232	Implement Queue using Stacks	★	double_ended_stack
✔	233	Number of Digit One	★★★	iterative iterative_2 iterative_3
✔	234	Palindrome Linked List	★	iterative
✔	235	Lowest Common Ancestor of a Binary Search Tree	★★	iterative recursive
✔	236	Lowest Common Ancestor of a Binary Tree	★★	recursive
✔	237	Delete Node in a Linked List	★★		modify-this
✔	238	Product of Array Except Self	★★	two_passes
✔	239	Sliding Window Maximum	★★★	deque deque_2
✔	240	Search a 2D Matrix II	★★	eliminate_row_or_column eliminate_row_or_column_2
✔	241	Different Ways to Add Parentheses	★★	backtracking dynamic_programming
✔	242	Valid Anagram	★	direct_address_table
✔	257	Binary Tree Paths	★	recursive recursive_2
✔	258	Add Digits	★	formula
✔	260	Single Number III	★★	partition_by_bit
✔	263	Ugly Number	★	brute_force
✔	264	Ugly Number II	★★	dynamic_programming dynamic_programming_short
✔	268	Missing Number	★	pigeonhole reduce_sum reduce_xor
✔	273	Integer to English Words	★★★	group_by_thousands
✔	274	H-Index	★★	counting_sort
✔	275	H-Index II	★★	binary_search iterative
✔	278	First Bad Version	★	binary_search
✔	279	Perfect Squares	★★	bfs bfs_2
✔	282	Expression Add Operators	★★★	backtracking backtracking_2
✔	283	Move Zeroes	★	iterative
	284	Peeking Iterator	★★
✔	287	Find the Duplicate Number	★★	cycle_detection
✔	289	Game of Life	★★	two_passes
✔	290	Word Pattern	★	hash_map index_hash_map
✔	292	Nim Game	★	dynamic_programming
✔	295	Find Median from Data Stream	★★★	two_heaps
✔	297	Serialize and Deserialize Binary Tree	★★★	level_order_traversal preorder_traversal
✔	299	Bulls and Cows	★★	iterative
✔	300	Longest Increasing Subsequence	★★	dynamic_programming_fast dynamic_programming_slow
✔	301	Remove Invalid Parentheses	★★★	backtracking backtracking_2
✔	303	Range Sum Query - Immutable	★	cumulative_sum cumulative_sum_2
✔	304	Range Sum Query 2D - Immutable	★★	cumulative_sum
✔	306	Additive Number	★★	brute_force
✔	307	Range Sum Query - Mutable	★★	fenwick_tree segment_tree segment_tree_2
✔	309	Best Time to Buy and Sell Stock with Cooldown	★★	dynamic_programming
✔	310	Minimum Height Trees	★★	bfs bfs_2
✔	312	Burst Balloons	★★★	dynamic_programming
✔	313	Super Ugly Number	★★	dynamic_programming dynamic_programming_binary_heap
✔	315	Count of Smaller Numbers After Self	★★★	fenwick_tree merge_sort
✔	316	Remove Duplicate Letters	★★	stack
✔	318	Maximum Product of Word Lengths	★★	bit_mask
✔	319	Bulb Switcher	★★	mathematical
✔	321	Create Maximum Number	★★★	dynamic_programming dynamic_programming_2 greedy	dynamic-programming greedy
✔	322	Coin Change	★★	dynamic_programming dynamic_programming_2
✔	324	Wiggle Sort II	★★	find_median
✔	326	Power of Three	★	division
✔	327	Count of Range Sum	★★★	merge_sort
✔	328	Odd Even Linked List	★★	iterative
✔	329	Longest Increasing Path in a Matrix	★★★	dynamic_programming
✔	330	Patching Array	★★★	greedy
✔	331	Verify Preorder Serialization of a Binary Tree	★★	iterative iterative_2 iterative_3 recursive
✔	332	Reconstruct Itinerary	★★★	dfs dfs_2 dfs_3
✔	334	Increasing Triplet Subsequence	★★	iterative iterative_2 iterative_3
✔	335	Self Crossing	★★★	iterative iterative_2
✔	336	Palindrome Pairs	★★★	b_tree_map hash_map trie
✔	337	House Robber III	★★	recursive
✔	338	Counting Bits	★	dynamic_programming dynamic_programming_2
✔	341	Flatten Nested List Iterator	★★	stack stack_2
✔	342	Power of Four	★	bit_mask
✔	343	Integer Break	★★	mathematical
✔	344	Reverse String	★	cheating indices iterator
✔	345	Reverse Vowels of a String	★	iterator iterator_2
✔	347	Top K Frequent Elements	★★	quick_select
✔	349	Intersection of Two Arrays	★	cheating single_set two_sets
✔	350	Intersection of Two Arrays II	★	single_map
✔	352	Data Stream as Disjoint Intervals	★★★	ordered_map union_find
✔	354	Russian Doll Envelopes	★★★	longest_increasing_subsequence
✔	355	Design Twitter	★★	binary_heap binary_heap_2
✔	357	Count Numbers with Unique Digits	★★	mathematical precomputed
✔	363	Max Sum of Rectangle No Larger Than K	★★★	reduce_to_subarray_sum
✔	365	Water and Jug Problem	★★	mathematical
✔	367	Valid Perfect Square	★	binary_search newtons_method
✔	368	Largest Divisible Subset	★★	dynamic_programming
✔	371	Sum of Two Integers	★★	sum_and_carry
✔	372	Super Pow	★★	iterative iterative_2
✔	373	Find K Pairs with Smallest Sums	★★	bfs	bfs-2 bfs
✔	374	Guess Number Higher or Lower	★	binary_search
✔	375	Guess Number Higher or Lower II	★★	dynamic_programming
✔	376	Wiggle Subsequence	★★	greedy
✔	377	Combination Sum IV	★★	dynamic_programming memoized_dynamic_programming
✔	378	Kth Smallest Element in a Sorted Matrix	★★	bfs bfs_2 binary_search binary_search_2 binary_search_3 divide_and_conquer	bfs-2 binary-search-2 binary-search-3 binary-search
	380	Insert Delete GetRandom O(1)	★★
	381	Insert Delete GetRandom O(1) - Duplicates allowed	★★★
	382	Linked List Random Node	★★
✔	383	Ransom Note	★	direct_address_table hash_map
	384	Shuffle an Array	★★
✔	385	Mini Parser	★★	recursive
✔	386	Lexicographical Numbers	★★	dfs iterative_dfs	iterative-dfs
✔	387	First Unique Character in a String	★	iterative
✔	388	Longest Absolute File Path	★★	iterative recursive
✔	389	Find the Difference	★	reduce_xor
✔	390	Elimination Game	★★	mathematical recursive
✔	391	Perfect Rectangle	★★★	count_corners
✔	392	Is Subsequence	★	greedy
✔	393	UTF-8 Validation	★★	iterative
✔	394	Decode String	★★	recursive stack stack_2
✔	395	Longest Substring with At Least K Repeating Characters	★★	divide_and_conquer sliding_window
✔	396	Rotate Function	★★	iterative
✔	397	Integer Replacement	★★	dynamic_programming greedy recursive
	398	Random Pick Index	★★
✔	399	Evaluate Division	★★	bfs
✔	400	Nth Digit	★★	binary_search iterative
✔	401	Binary Watch	★	backtracking
✔	402	Remove K Digits	★★	greedy greedy_2 stack	greedy-2 greedy
✔	403	Frog Jump	★★★	bfs dfs iterative
✔	404	Sum of Left Leaves	★	recursive
✔	405	Convert a Number to Hexadecimal	★	cheating iterative
✔	406	Queue Reconstruction by Height	★★	binary_search_tree fenwick_tree insertion insertion_2	binary-search-tree fenwick-tree insertion
✔	407	Trapping Rain Water II	★★★	bfs
✔	409	Longest Palindrome	★	iterative iterative_2
✔	410	Split Array Largest Sum	★★★	binary_search
✔	412	Fizz Buzz	★	iterative iterative_2
✔	413	Arithmetic Slices	★★	clever_iterative iterative
✔	414	Third Maximum Number	★	iterative
✔	415	Add Strings	★	implicit_carry implicit_carry_2 naive
✔	416	Partition Equal Subset Sum	★★	knapsack
✔	417	Pacific Atlantic Water Flow	★★	bfs
✔	419	Battleships in a Board	★★	count_heads
✔	420	Strong Password Checker	★★★	greedy
✔	421	Maximum XOR of Two Numbers in an Array	★★	hash_map trie
✔	423	Reconstruct Original Digits from English	★★	solve_equations
✔	424	Longest Repeating Character Replacement	★★	sliding_window sliding_window_2
	427	Construct Quad Tree	★★
	429	N-ary Tree Level Order Traversal	★★
	430	Flatten a Multilevel Doubly Linked List	★★
✔	432	All O`one Data Structure	★★★	doubly_linked_list
✔	433	Minimum Genetic Mutation	★★	bidirectional_bfs
✔	434	Number of Segments in a String	★	cheating iterative
✔	435	Non-overlapping Intervals	★★	greedy
✔	436	Find Right Interval	★★	sort_and_merge sort_and_scan	sort-and-merge sort-and-scan
✔	437	Path Sum III	★★	recursive
✔	438	Find All Anagrams in a String	★★	sliding_window sliding_window_2
✔	440	K-th Smallest in Lexicographical Order	★★★	tree_preorder_traversal
✔	441	Arranging Coins	★	newtons_method smart_newtons_method smarter_newtons_method
✔	442	Find All Duplicates in an Array	★★	highest_bit_as_marker pigeonhole
✔	443	String Compression	★★	iterative
✔	445	Add Two Numbers II	★★	reverse_output
✔	446	Arithmetic Slices II - Subsequence	★★★	dynamic_programming
✔	447	Number of Boomerangs	★★	group_by_circles
✔	448	Find All Numbers Disappeared in an Array	★	highest_bit_as_marker pigeonhole
✔	449	Serialize and Deserialize BST	★★	preorder_traversal
✔	450	Delete Node in a BST	★★	lift_right_min
✔	451	Sort Characters By Frequency	★★	sort_counts
✔	452	Minimum Number of Arrows to Burst Balloons	★★	greedy
✔	453	Minimum Moves to Equal Array Elements	★★	iterative
✔	454	4Sum II	★★	reduce_to_two_sum
✔	455	Assign Cookies	★	greedy
✔	456	132 Pattern	★★	stack stack_2
✔	457	Circular Array Loop	★★	iterative
✔	458	Poor Pigs	★★★	mathematical
✔	459	Repeated Substring Pattern	★	bidirectional_search
✔	460	LFU Cache	★★★	map_to_nested_linked_lists
✔	461	Hamming Distance	★	xor
✔	462	Minimum Moves to Equal Array Elements II	★★	median
✔	463	Island Perimeter	★	brute_force
✔	464	Can I Win	★★	memoized_dynamic_programming
✔	466	Count The Repetitions	★★★	find_repeated_pattern
✔	467	Unique Substrings in Wraparound String	★★	brute_force
✔	468	Validate IP Address	★★	check_one_by_one
	470	Implement Rand10() Using Rand7()	★★
✔	472	Concatenated Words	★★★	trie_and_dynamic_programming
✔	473	Matchsticks to Square	★★	backtracking
✔	474	Ones and Zeroes	★★	dynamic_programming
✔	475	Heaters	★★	iterative
✔	476	Number Complement	★	bit_manipulation bit_manipulation_2 bit_manipulation_3
✔	477	Total Hamming Distance	★★	iterative
	478	Generate Random Point in a Circle	★★
✔	479	Largest Palindrome Product	★★★	iterative
✔	480	Sliding Window Median	★★★	two_binary_heaps two_sets
✔	481	Magical String	★★	deque generator state_machine state_machine_2
✔	482	License Key Formatting	★	iterative
✔	483	Smallest Good Base	★★★	iterative
✔	485	Max Consecutive Ones	★	iterative iterative_2 iterative_3 tail_recursive
✔	486	Predict the Winner	★★	dynamic_programming
✔	488	Zuma Game	★★★	bfs
✔	491	Non-decreasing Subsequences	★★	recursive
✔	492	Construct the Rectangle	★	iterative
✔	493	Reverse Pairs	★★★	divide_and_conquer
✔	494	Target Sum	★★	dynamic_programming memoized_dynamic_programming
✔	495	Teemo Attacking	★	iterative iterative_2
✔	496	Next Greater Element I	★	hash_map_and_stack
	497	Random Point in Non-overlapping Rectangles	★★
✔	498	Diagonal Traverse	★★	iterative
✔	500	Keyboard Row	★	iterative
✔	501	Find Mode in Binary Search Tree	★	recursive
✔	502	IPO	★★★	greedy
✔	503	Next Greater Element II	★★	stack
✔	504	Base 7	★	iterative
✔	506	Relative Ranks	★	sort_indices
✔	507	Perfect Number	★	cheating iterative
✔	508	Most Frequent Subtree Sum	★★	recursive
✔	509	Fibonacci Number	★	dynamic_programming fast_iterative fast_recursive unsafe_math
✔	513	Find Bottom Left Tree Value	★★	bfs bfs_2
✔	514	Freedom Trail	★★★	dynamic_programming
✔	515	Find Largest Value in Each Tree Row	★★	bfs
✔	516	Longest Palindromic Subsequence	★★	dynamic_programming memoized_dynamic_programming
✔	517	Super Washing Machines	★★★	iterative
✔	518	Coin Change II	★★	dynamic_programming
	519	Random Flip Matrix	★★
✔	520	Detect Capital	★	iterative pattern_matching
✔	521	Longest Uncommon Subsequence I	★	standard
✔	522	Longest Uncommon Subsequence II	★★	trie
✔	523	Continuous Subarray Sum	★★	modular_arithmetic
✔	524	Longest Word in Dictionary through Deleting	★★	trie
✔	525	Contiguous Array	★★	iterative
✔	526	Beautiful Arrangement	★★	backtracking
	528	Random Pick with Weight	★★
✔	529	Minesweeper	★★	bfs
✔	530	Minimum Absolute Difference in BST	★	recursive
✔	532	K-diff Pairs in an Array	★★	hash_set
✔	535	Encode and Decode TinyURL	★★	hash_maps hash_maps_online_hack
✔	537	Complex Number Multiplication	★★	parsing
✔	538	Convert BST to Greater Tree	★★	recursive
✔	539	Minimum Time Difference	★★	iterative
✔	540	Single Element in a Sorted Array	★★	binary_search binary_search_2
✔	541	Reverse String II	★	reverse_by_chunks
✔	542	01 Matrix	★★	bfs dynamic_programming
✔	543	Diameter of Binary Tree	★	recursive recursive_2
✔	546	Remove Boxes	★★★	dynamic_programming memoized_dynamic_programming
✔	547	Number of Provinces	★★	bfs
✔	551	Student Attendance Record I	★	iterative state_machine state_machine_2
✔	552	Student Attendance Record II	★★★	dynamic_programming matrix_multiplication
✔	553	Optimal Division	★★	dynamic_programming mathematical
✔	554	Brick Wall	★★	hash_map
✔	556	Next Greater Element III	★★	next_permutation
✔	557	Reverse Words in a String III	★	iterative
	558	Logical OR of Two Binary Grids Represented as Quad-Trees	★★
	559	Maximum Depth of N-ary Tree	★
✔	560	Subarray Sum Equals K	★★	prefix_sum
✔	561	Array Partition	★	sorting
✔	563	Binary Tree Tilt	★	recursive
✔	564	Find the Closest Palindrome	★★★	brute_force
✔	565	Array Nesting	★★	iterative
✔	566	Reshape the Matrix	★	iterative
✔	567	Permutation in String	★★	sliding_window
✔	572	Subtree of Another Tree	★	hash_map hashing
✔	575	Distribute Candies	★	hash_set
✔	576	Out of Boundary Paths	★★	dynamic_programming
✔	581	Shortest Unsorted Continuous Subarray	★★	iterative
✔	583	Delete Operation for Two Strings	★★	dynamic_programming
✔	587	Erect the Fence	★★★	grahams_scan
	589	N-ary Tree Preorder Traversal	★
	590	N-ary Tree Postorder Traversal	★
✔	591	Tag Validator	★★★	recursive_descent recursive_descent_2
✔	592	Fraction Addition and Subtraction	★★	iterative
✔	593	Valid Square	★★	mathematical
✔	594	Longest Harmonious Subsequence	★	iterative
✔	598	Range Addition II	★	iterative
✔	599	Minimum Index Sum of Two Lists	★	index_map
✔	600	Non-negative Integers without Consecutive Ones	★★★	mathematical mathematical_2
✔	605	Can Place Flowers	★	iterative
✔	606	Construct String from Binary Tree	★	recursive
✔	609	Find Duplicate File in System	★★	hash_map
✔	611	Valid Triangle Number	★★	sort_then_binary_search
✔	617	Merge Two Binary Trees	★	recursive
✔	621	Task Scheduler	★★	greedy mathematical
✔	622	Design Circular Queue	★★	head_and_tail start_and_length
✔	623	Add One Row to Tree	★★	recursive
✔	628	Maximum Product of Three Numbers	★	dynamic_programming
✔	629	K Inverse Pairs Array	★★★	dynamic_programming
✔	630	Course Schedule III	★★★	binary_heap
✔	632	Smallest Range Covering Elements from K Lists	★★★	binary_heap sliding_window
✔	633	Sum of Square Numbers	★★	brute_force two_pointers
✔	636	Exclusive Time of Functions	★★	stack
✔	637	Average of Levels in Binary Tree	★	bfs
✔	638	Shopping Offers	★★	memoized_dynamic_programming memoized_dynamic_programming_2 memoized_dynamic_programming_3
✔	639	Decode Ways II	★★★	dynamic_programming
✔	640	Solve the Equation	★★	iterative
✔	641	Design Circular Deque	★★	head_and_tail start_and_length
✔	643	Maximum Average Subarray I	★	sliding_window
✔	645	Set Mismatch	★	highest_bit_as_marker partition_by_bit
✔	646	Maximum Length of Pair Chain	★★	greedy
✔	647	Palindromic Substrings	★★	brute_force
✔	648	Replace Words	★★	trie
✔	649	Dota2 Senate	★★	greedy
✔	650	2 Keys Keyboard	★★	bfs prime_factorization
✔	652	Find Duplicate Subtrees	★★	cached_hash_values hash_map
✔	653	Two Sum IV - Input is a BST	★	bst_iterator
✔	654	Maximum Binary Tree	★★	stack
✔	655	Print Binary Tree	★★	recursive
✔	657	Robot Return to Origin	★	iterative
✔	658	Find K Closest Elements	★★	binary_search
✔	659	Split Array into Consecutive Subsequences	★★	check_by_chunks two_binary_heaps two_optimized_binary_heaps
✔	661	Image Smoother	★	brute_force
✔	662	Maximum Width of Binary Tree	★★	bfs
✔	664	Strange Printer	★★★	dynamic_programming
✔	665	Non-decreasing Array	★★	iterative
✔	667	Beautiful Arrangement II	★★	stack
✔	668	Kth Smallest Number in Multiplication Table	★★★	binary_search
✔	669	Trim a Binary Search Tree	★★	recursive
✔	670	Maximum Swap	★★	iterative
✔	671	Second Minimum Node In a Binary Tree	★	specialized_recursive
✔	672	Bulb Switcher II	★★	brute_force enumerate
✔	673	Number of Longest Increasing Subsequence	★★	dynamic_programming
✔	674	Longest Continuous Increasing Subsequence	★	iterative
✔	675	Cut Off Trees for Golf Event	★★★	bfs
✔	676	Implement Magic Dictionary	★★	hash_map hash_map_2 trie trie_2 trie_3
✔	677	Map Sum Pairs	★★	trie
✔	678	Valid Parenthesis String	★★	stack
✔	679	24 Game	★★★	backtracking
✔	680	Valid Palindrome II	★	iterative
✔	682	Baseball Game	★	stack
✔	684	Redundant Connection	★★	union_find
✔	685	Redundant Connection II	★★★	union_find
✔	686	Repeated String Match	★★	search_substring
✔	687	Longest Univalue Path	★★	recursive
✔	688	Knight Probability in Chessboard	★★	dynamic_programming
✔	689	Maximum Sum of 3 Non-Overlapping Subarrays	★★★	dynamic_programming
	690	Employee Importance	★★
✔	691	Stickers to Spell Word	★★★	bfs memoized_dynamic_programming
✔	692	Top K Frequent Words	★★	quick_select
✔	693	Binary Number with Alternating Bits	★	count_leading_zeros xor_with_shifting
✔	695	Max Area of Island	★★	bfs
✔	696	Count Binary Substrings	★	iterative
✔	697	Degree of an Array	★	hash_map
✔	698	Partition to K Equal Sum Subsets	★★	backtracking
✔	699	Falling Squares	★★★	btree_map segment_tree
✔	700	Search in a Binary Search Tree	★	iterative
✔	701	Insert into a Binary Search Tree	★★	iterative
✔	703	Kth Largest Element in a Stream	★	binary_heap
✔	704	Binary Search	★	canonical cheating fast fast_2 three_way three_way_fast
✔	705	Design HashSet	★	store_by_buckets
✔	706	Design HashMap	★	store_by_buckets
✔	707	Design Linked List	★★	doubly_linked_list
✔	709	To Lower Case	★	cheating iterative
	710	Random Pick with Blacklist	★★★
✔	712	Minimum ASCII Delete Sum for Two Strings	★★	dynamic_programming
✔	713	Subarray Product Less Than K	★★	sliding_window
✔	714	Best Time to Buy and Sell Stock with Transaction Fee	★★	dynamic_programming
✔	715	Range Module	★★★	btree_map
✔	717	1-bit and 2-bit Characters	★	iterative
✔	718	Maximum Length of Repeated Subarray	★★	binary_search
✔	719	Find K-th Smallest Pair Distance	★★★	binary_search
✔	720	Longest Word in Dictionary	★★	trie
✔	721	Accounts Merge	★★	iterative_dfs
✔	722	Remove Comments	★★	iterative
✔	724	Find Pivot Index	★	iterative
✔	725	Split Linked List in Parts	★★	two_passes
✔	726	Number of Atoms	★★★	right_to_left_recursive_descent
✔	728	Self Dividing Numbers	★	brute_force brute_force_2
✔	729	My Calendar I	★★	btree_map
✔	730	Count Different Palindromic Subsequences	★★★	dynamic_programming
✔	731	My Calendar II	★★	sweep_line
✔	732	My Calendar III	★★★	sweep_line
✔	733	Flood Fill	★	bfs
✔	735	Asteroid Collision	★★	stack
✔	736	Parse Lisp Expression	★★★	recursive_descent
✔	738	Monotone Increasing Digits	★★	iterative
✔	739	Daily Temperatures	★★	stack
✔	740	Delete and Earn	★★	dynamic_programming
✔	741	Cherry Pickup	★★★	dynamic_programming
✔	743	Network Delay Time	★★	dijkstra dijkstra_2
✔	744	Find Smallest Letter Greater Than Target	★	binary_search
✔	745	Prefix and Suffix Search	★★★	trie_with_enumerated_suffixes two_tries
✔	746	Min Cost Climbing Stairs	★	dynamic_programming
✔	747	Largest Number At Least Twice of Others	★	greedy
✔	748	Shortest Completing Word	★	iterative
✔	749	Contain Virus	★★★	bfs bfs_2 bfs_3
✔	752	Open the Lock	★★	bfs bfs_2 bidirectional_bfs
✔	753	Cracking the Safe	★★★	dfs iterative recursive
✔	754	Reach a Number	★★	mathematical
✔	756	Pyramid Transition Matrix	★★	block_by_block_backtracking cached_layer_by_layer_backtracking layer_by_layer_backtracking
✔	757	Set Intersection Size At Least Two	★★★	greedy
✔	761	Special Binary String	★★★	recursive recursive_2
✔	762	Prime Number of Set Bits in Binary Representation	★	brute_force combinations
✔	763	Partition Labels	★★	greedy merge_intervals
✔	764	Largest Plus Sign	★★	dynamic_programming
✔	765	Couples Holding Hands	★★★	find_cycles
✔	766	Toeplitz Matrix	★	iterative
✔	767	Reorganize String	★★	buckets even_odd
✔	768	Max Chunks To Make Sorted II	★★★	iterative
✔	769	Max Chunks To Make Sorted	★★	greedy
✔	770	Basic Calculator IV	★★★	recursive
✔	771	Jewels and Stones	★	brute_force
✔	773	Sliding Puzzle	★★★	bidirectional_bfs
✔	775	Global and Local Inversions	★★	iterative iterative_2 iterative_3
✔	777	Swap Adjacent in LR String	★★	iterative
✔	778	Swim in Rising Water	★★★	bfs bidirectional_bfs
✔	779	K-th Symbol in Grammar	★★	mathematical
✔	780	Reaching Points	★★★	mathematical
✔	781	Rabbits in Forest	★★	buckets
✔	782	Transform to Chessboard	★★★	iterative
✔	783	Minimum Distance Between BST Nodes	★	recursive
✔	784	Letter Case Permutation	★★	backtracking
✔	785	Is Graph Bipartite?	★★	bfs
✔	786	K-th Smallest Prime Fraction	★★	divide_and_conquer
✔	787	Cheapest Flights Within K Stops	★★	bfs dijkstra
✔	788	Rotated Digits	★★	iterative
✔	789	Escape The Ghosts	★★	mathematical
✔	790	Domino and Tromino Tiling	★★	dynamic_programming matrix_multiplication
✔	791	Custom Sort String	★★	counting_sort
✔	792	Number of Matching Subsequences	★★	buckets trie trie_2
✔	793	Preimage Size of Factorial Zeroes Function	★★★	binary_search iterative
✔	794	Valid Tic-Tac-Toe State	★★	brute_force
✔	795	Number of Subarrays with Bounded Maximum	★★	iterative
✔	796	Rotate String	★	find_in_repeated_string
✔	797	All Paths From Source to Target	★★	dfs
✔	798	Smallest Rotation with Highest Score	★★★	count_interval_intersections
✔	799	Champagne Tower	★★	dynamic_programming
✔	801	Minimum Swaps To Make Sequences Increasing	★★★	dynamic_programming
✔	802	Find Eventual Safe States	★★	cycle_detection
✔	803	Bricks Falling When Hit	★★★	reverse_time_and_union_find
✔	804	Unique Morse Code Words	★	hash_set
✔	805	Split Array With Same Average	★★★	memoized_dynamic_programming
✔	806	Number of Lines To Write String	★	iterative
✔	807	Max Increase to Keep City Skyline	★★	iterative
✔	808	Soup Servings	★★	bounded_memoized_dynamic_programming
✔	809	Expressive Words	★★	iterative
✔	810	Chalkboard XOR Game	★★★	iterative
✔	811	Subdomain Visit Count	★★	hash_map
✔	812	Largest Triangle Area	★	brute_force convex_hull
✔	813	Largest Sum of Averages	★★	dynamic_programming
✔	814	Binary Tree Pruning	★★	recursive
✔	815	Bus Routes	★★★	bidirectional_bfs bidirectional_bfs_2
✔	816	Ambiguous Coordinates	★★	brute_force
✔	817	Linked List Components	★★	iterative iterative_2
✔	818	Race Car	★★★	bfs dynamic_programming
✔	819	Most Common Word	★	hash_map hash_map_2
✔	820	Short Encoding of Words	★★	trie trie_2 trie_3
✔	821	Shortest Distance to a Character	★	iterative
✔	822	Card Flipping Game	★★	iterative
✔	823	Binary Trees With Factors	★★	dynamic_programming
✔	824	Goat Latin	★	iterative
✔	825	Friends Of Appropriate Ages	★★	iterative
✔	826	Most Profit Assigning Work	★★	iterative
✔	827	Making A Large Island	★★★	bfs
✔	828	Count Unique Characters of All Substrings of a Given String	★★★	dynamic_programming iterative
✔	829	Consecutive Numbers Sum	★★★	brute_force
✔	830	Positions of Large Groups	★	iterative
✔	831	Masking Personal Information	★★	iterative
✔	832	Flipping an Image	★	naive
✔	833	Find And Replace in String	★★	iterative
✔	834	Sum of Distances in Tree	★★★	dfs
✔	835	Image Overlap	★★	brute_force
✔	836	Rectangle Overlap	★	reduce_to_line_overlap
✔	837	New 21 Game	★★	dynamic_programming sliding_window sliding_window_2
✔	838	Push Dominoes	★★	iterative
✔	839	Similar String Groups	★★★	bfs
✔	840	Magic Squares In Grid	★★	brute_force
✔	841	Keys and Rooms	★★	bfs
✔	842	Split Array into Fibonacci Sequence	★★	brute_force
✔	843	Guess the Word	★★★	brute_force brute_force_2 brute_force_3
✔	844	Backspace String Compare	★	reversed_iterator stack
✔	845	Longest Mountain in Array	★★	iterative
✔	846	Hand of Straights	★★	iterative iterative_2
✔	847	Shortest Path Visiting All Nodes	★★★	bfs
✔	848	Shifting Letters	★★	iterative
✔	849	Maximize Distance to Closest Person	★★	iterative
✔	850	Rectangle Area II	★★★	sweep_line_with_segment_tree
✔	851	Loud and Rich	★★	dfs dfs_2
✔	852	Peak Index in a Mountain Array	★★	binary_search iterative
✔	853	Car Fleet	★★	iterative
✔	854	K-Similar Strings	★★★	bfs
✔	855	Exam Room	★★	binary_heap
✔	856	Score of Parentheses	★★	iterative recursive recursive_2
✔	857	Minimum Cost to Hire K Workers	★★★	binary_heap
✔	858	Mirror Reflection	★★	mathematical mathematical_2
✔	859	Buddy Strings	★	brute_force
✔	860	Lemonade Change	★	iterative
✔	861	Score After Flipping Matrix	★★	iterative
✔	862	Shortest Subarray with Sum at Least K	★★★	sliding_window
✔	863	All Nodes Distance K in Binary Tree	★★	bfs
✔	864	Shortest Path to Get All Keys	★★★	bfs
✔	865	Smallest Subtree with all the Deepest Nodes	★★	recursive
✔	866	Prime Palindrome	★★	brute_force
✔	867	Transpose Matrix	★	brute_force
✔	868	Binary Gap	★	iterative
✔	869	Reordered Power of 2	★★	brute_force
✔	870	Advantage Shuffle	★★	sort_and_merge
✔	871	Minimum Number of Refueling Stops	★★★	greedy
✔	872	Leaf-Similar Trees	★	iterator
✔	873	Length of Longest Fibonacci Subsequence	★★	dynamic_programming dynamic_programming_2
✔	874	Walking Robot Simulation	★★	iterative
✔	875	Koko Eating Bananas	★★	binary_search
✔	876	Middle of the Linked List	★	iterative
✔	877	Stone Game	★★	dynamic_programming mathematical
✔	878	Nth Magical Number	★★★	binary_search mathematical
✔	879	Profitable Schemes	★★★	dynamic_programming
✔	880	Decoded String at Index	★★	iterative
✔	881	Boats to Save People	★★	two_pointers two_pointers_2
✔	882	Reachable Nodes In Subdivided Graph	★★★	dijkstra
✔	883	Projection Area of 3D Shapes	★	iterative
✔	884	Uncommon Words from Two Sentences	★	hash_map
✔	885	Spiral Matrix III	★★	iterative
✔	886	Possible Bipartition	★★	bfs
✔	887	Super Egg Drop	★★★	binary_search
✔	888	Fair Candy Swap	★	iterative
✔	889	Construct Binary Tree from Preorder and Postorder Traversal	★★	recursive recursive_2
✔	890	Find and Replace Pattern	★★	iterative
✔	891	Sum of Subsequence Widths	★★★	count_add_and_sub_separately
✔	892	Surface Area of 3D Shapes	★	iterative
✔	893	Groups of Special-Equivalent Strings	★★	hash_set
✔	894	All Possible Full Binary Trees	★★	dynamic_programming
✔	895	Maximum Frequency Stack	★★★	stack_of_stacks
✔	896	Monotonic Array	★	iterative
✔	897	Increasing Order Search Tree	★	recursive
✔	898	Bitwise ORs of Subarrays	★★	iterative
✔	899	Orderly Queue	★★★	duval
✔	900	RLE Iterator	★★	iterative
✔	901	Online Stock Span	★★	monotonic_stack
✔	902	Numbers At Most N Given Digit Set	★★★	iterative
✔	903	Valid Permutations for DI Sequence	★★★	dynamic_programming
✔	904	Fruit Into Baskets	★★	iterative
✔	905	Sort Array By Parity	★	iterative
✔	906	Super Palindromes	★★★	brute_force
✔	907	Sum of Subarray Minimums	★★	monotonic_stack
✔	908	Smallest Range I	★	iterative
✔	909	Snakes and Ladders	★★	bfs
✔	910	Smallest Range II	★★	iterative
✔	911	Online Election	★★	precompute
✔	912	Sort an Array	★★	cheating cheating_unstable counting_sort_and_unstable_sort_hybrid heap_sort merge_sort quick_sort quick_sort_with_three_way_partition radix_sort
✔	913	Cat and Mouse	★★★	minimax_queue minimax_stack
✔	914	X of a Kind in a Deck of Cards	★	gcd
✔	915	Partition Array into Disjoint Intervals	★★	iterative
✔	916	Word Subsets	★★	iterative
✔	917	Reverse Only Letters	★	iterative
✔	918	Maximum Sum Circular Subarray	★★	iterative
✔	919	Complete Binary Tree Inserter	★★	queue
✔	920	Number of Music Playlists	★★★	dynamic_programming
✔	921	Minimum Add to Make Parentheses Valid	★★	stack
✔	922	Sort Array By Parity II	★	iterative
✔	923	3Sum With Multiplicity	★★	combinations dynamic_programming
✔	924	Minimize Malware Spread	★★★	bfs
✔	925	Long Pressed Name	★	iterative iterative_2 iterator
✔	926	Flip String to Monotone Increasing	★★	iterative iterative_2
✔	927	Three Equal Parts	★★★	iterative
✔	928	Minimize Malware Spread II	★★★	bfs
✔	929	Unique Email Addresses	★	iterative
✔	930	Binary Subarrays With Sum	★★	sliding_window
✔	931	Minimum Falling Path Sum	★★	dynamic_programming
✔	932	Beautiful Array	★★	dynamic_programming
✔	933	Number of Recent Calls	★	queue
✔	934	Shortest Bridge	★★	bfs
✔	935	Knight Dialer	★★	dynamic_programming matrix_multiplication
✔	936	Stamping The Sequence	★★★	greedy
✔	937	Reorder Data in Log Files	★★	partition_and_sort
✔	938	Range Sum of BST	★	recursive recursive_2
✔	939	Minimum Area Rectangle	★★	merge_by_columns
✔	940	Distinct Subsequences II	★★★	dynamic_programming
✔	941	Valid Mountain Array	★	iterative
✔	942	DI String Match	★	dynamic_programming
✔	943	Find the Shortest Superstring	★★★	kmp_and_held_karp
✔	944	Delete Columns to Make Sorted	★	brute_force
✔	945	Minimum Increment to Make Array Unique	★★	greedy
✔	946	Validate Stack Sequences	★★	simulation
✔	947	Most Stones Removed with Same Row or Column	★★	connected_components connected_components_2
✔	948	Bag of Tokens	★★	greedy
✔	949	Largest Time for Given Digits	★★	brute_force
✔	950	Reveal Cards In Increasing Order	★★	recursive
✔	951	Flip Equivalent Binary Trees	★★	recursive
✔	952	Largest Component Size by Common Factor	★★★	union_find
✔	953	Verifying an Alien Dictionary	★	iterative
✔	954	Array of Doubled Pairs	★★	iterative
✔	955	Delete Columns to Make Sorted II	★★	greedy
✔	956	Tallest Billboard	★★★	dynamic_programming
✔	957	Prison Cells After N Days	★★	find_cycle
✔	958	Check Completeness of a Binary Tree	★★	bfs
✔	959	Regions Cut By Slashes	★★	bfs
✔	960	Delete Columns to Make Sorted III	★★★	dynamic_programming
✔	961	N-Repeated Element in Size 2N Array	★	iterative
✔	962	Maximum Width Ramp	★★	monotonic_stack
✔	963	Minimum Area Rectangle II	★★	brute_force brute_force_2 brute_force_3
✔	964	Least Operators to Express Number	★★★	dynamic_programming
✔	965	Univalued Binary Tree	★	recursive
✔	966	Vowel Spellchecker	★★	iterative
✔	967	Numbers With Same Consecutive Differences	★★	dfs
✔	968	Binary Tree Cameras	★★★	dynamic_programming
✔	969	Pancake Sorting	★★	iterative
✔	970	Powerful Integers	★★	brute_force
✔	971	Flip Binary Tree To Match Preorder Traversal	★★	recursive
✔	972	Equal Rational Numbers	★★★	convert_to_fraction
✔	973	K Closest Points to Origin	★★	quick_select
✔	974	Subarray Sums Divisible by K	★★	iterative
✔	975	Odd Even Jump	★★★	dynamic_programming
✔	976	Largest Perimeter Triangle	★	greedy
✔	977	Squares of a Sorted Array	★	merge
✔	978	Longest Turbulent Subarray	★★	flip_every_second_order
✔	979	Distribute Coins in Binary Tree	★★	count_edge_flow
✔	980	Unique Paths III	★★★	backtracking memoized_dynamic_programming
✔	981	Time Based Key-Value Store	★★	binary_search binary_search_2
✔	982	Triples with Bitwise AND Equal To Zero	★★★	iterative
✔	983	Minimum Cost For Tickets	★★	dynamic_programming dynamic_programming_2
✔	984	String Without AAA or BBB	★★	greedy
✔	985	Sum of Even Numbers After Queries	★★	iterative
✔	986	Interval List Intersections	★★	iterative
✔	987	Vertical Order Traversal of a Binary Tree	★★★	recursive
✔	988	Smallest String Starting From Leaf	★★	bottom_up
✔	989	Add to Array-Form of Integer	★	iterative
✔	990	Satisfiability of Equality Equations	★★	bfs
✔	991	Broken Calculator	★★	greedy
✔	992	Subarrays with K Different Integers	★★★	sliding_window
✔	993	Cousins in Binary Tree	★	bfs
✔	994	Rotting Oranges	★★	bfs
✔	995	Minimum Number of K Consecutive Bit Flips	★★★	greedy_sliding_window greedy_sliding_window_inplace
✔	996	Number of Squareful Arrays	★★★	backtracking
✔	997	Find the Town Judge	★	iterative
✔	998	Maximum Binary Tree II	★★	iterative
✔	999	Available Captures for Rook	★	brute_force
✔	1000	Minimum Cost to Merge Stones	★★★	dynamic_programming
✔	1001	Grid Illumination	★★★	iterative
✔	1002	Find Common Characters	★	iterative
✔	1003	Check If Word Is Valid After Substitutions	★★	iterative recursive
✔	1004	Max Consecutive Ones III	★★	sliding_window
✔	1005	Maximize Sum Of Array After K Negations	★	greedy
✔	1006	Clumsy Factorial	★★	iterative
✔	1007	Minimum Domino Rotations For Equal Row	★★	find_major_element
✔	1008	Construct Binary Search Tree from Preorder Traversal	★★	recursive
✔	1009	Complement of Base 10 Integer	★	bit_manipulation bit_manipulation_2 bit_manipulation_3
✔	1010	Pairs of Songs With Total Durations Divisible by 60	★★	modular_arithmetic
✔	1011	Capacity To Ship Packages Within D Days	★★	binary_search
✔	1012	Numbers With Repeated Digits	★★★	iterative
✔	1013	Partition Array Into Three Parts With Equal Sum	★	iterative
✔	1014	Best Sightseeing Pair	★★	iterative
✔	1015	Smallest Integer Divisible by K	★★	find_cycle
✔	1016	Binary String With Substrings Representing 1 To N	★★	brute_force
✔	1017	Convert to Base -2	★★	iterative iterative_2 iterative_3
✔	1018	Binary Prefix Divisible By 5	★	modular_arithmetic
✔	1019	Next Greater Node In Linked List	★★	monotonic_stack
✔	1020	Number of Enclaves	★★	bfs
✔	1021	Remove Outermost Parentheses	★	iterative
✔	1022	Sum of Root To Leaf Binary Numbers	★	recursive
✔	1023	Camelcase Matching	★★	iterative
✔	1024	Video Stitching	★★	greedy
✔	1025	Divisor Game	★	mathematical
✔	1026	Maximum Difference Between Node and Ancestor	★★	recursive
✔	1027	Longest Arithmetic Subsequence	★★	dynamic_programming
✔	1028	Recover a Tree From Preorder Traversal	★★★	recursive stack
✔	1029	Two City Scheduling	★★	dynamic_programming
✔	1030	Matrix Cells in Distance Order	★	bfs
✔	1031	Maximum Sum of Two Non-Overlapping Subarrays	★★	dynamic_programming
✔	1032	Stream of Characters	★★★	dfa
✔	1033	Moving Stones Until Consecutive	★★	greedy
✔	1034	Coloring A Border	★★	bfs
✔	1035	Uncrossed Lines	★★	longest_common_subsequence
✔	1036	Escape a Large Maze	★★★	bfs
✔	1037	Valid Boomerang	★	check_gradient
✔	1038	Binary Search Tree to Greater Sum Tree	★★	recursive
✔	1039	Minimum Score Triangulation of Polygon	★★	dynamic_programming
✔	1040	Moving Stones Until Consecutive II	★★	iterative
✔	1041	Robot Bounded In Circle	★★	mathematical
✔	1042	Flower Planting With No Adjacent	★★	greedy
✔	1043	Partition Array for Maximum Sum	★★	dynamic_programming
✔	1044	Longest Duplicate Substring	★★★	binary_search_and_rolling_hash
✔	1046	Last Stone Weight	★	brute_force_with_binary_heap
✔	1047	Remove All Adjacent Duplicates In String	★	greedy
✔	1048	Longest String Chain	★★	dfs
✔	1049	Last Stone Weight II	★★	dynamic_programming
✔	1051	Height Checker	★	counting_sort
✔	1052	Grumpy Bookstore Owner	★★	sliding_window
✔	1053	Previous Permutation With One Swap	★★	iterative
✔	1054	Distant Barcodes	★★	even_odd
✔	1061	Lexicographically Smallest Equivalent String	★★	dfs union_find
✔	1071	Greatest Common Divisor of Strings	★	even_odd
✔	1072	Flip Columns For Maximum Number of Equal Rows	★★	dynamic_programming dynamic_programming_2
✔	1073	Adding Two Negabinary Numbers	★★	iterative
✔	1074	Number of Submatrices That Sum to Target	★★★	iterative
✔	1078	Occurrences After Bigram	★	iterative
✔	1079	Letter Tile Possibilities	★★	brute_force mathematical
✔	1080	Insufficient Nodes in Root to Leaf Paths	★★	recursive
✔	1081	Smallest Subsequence of Distinct Characters	★★	stack
✔	1089	Duplicate Zeros	★	count_zeros
✔	1090	Largest Values From Labels	★★	greedy
✔	1091	Shortest Path in Binary Matrix	★★	bfs
✔	1092	Shortest Common Supersequence	★★★	dynamic_programming
✔	1093	Statistics from a Large Sample	★★	iterative
✔	1094	Car Pooling	★★	binary_heap iterative iterative_2
✔	1095	Find in Mountain Array	★★★	binary_search
✔	1096	Brace Expansion II	★★★	parse_and_expand
✔	1103	Distribute Candies to People	★	brute_force
✔	1104	Path In Zigzag Labelled Binary Tree	★★	iterative
✔	1105	Filling Bookcase Shelves	★★	dynamic_programming
✔	1106	Parsing A Boolean Expression	★★★	recursive_descent recursive_descent_2
✔	1108	Defanging an IP Address	★	brute_force
✔	1109	Corporate Flight Bookings	★★	iterative
✔	1110	Delete Nodes And Return Forest	★★	recursive
✔	1111	Maximum Nesting Depth of Two Valid Parentheses Strings	★★	greedy group_by_even_odd
✔	1122	Relative Sort Array	★	hash_map
✔	1123	Lowest Common Ancestor of Deepest Leaves	★★	recursive
✔	1124	Longest Well-Performing Interval	★★	monotonic_stack
✔	1125	Smallest Sufficient Team	★★★	bfs
✔	1128	Number of Equivalent Domino Pairs	★	iterative
✔	1129	Shortest Path with Alternating Colors	★★	bfs
✔	1130	Minimum Cost Tree From Leaf Values	★★	monotonic_stack
✔	1131	Maximum of Absolute Value Expression	★★	iterative
✔	1137	N-th Tribonacci Number	★	matrix_multiplication
✔	1138	Alphabet Board Path	★★	iterative
✔	1139	Largest 1-Bordered Square	★★	iterative
✔	1140	Stone Game II	★★	dynamic_programming
✔	1143	Longest Common Subsequence	★★	dynamic_programming_1 dynamic_programming_2 memoized_dynamic_programming_1 memoized_dynamic_programming_2
✔	1144	Decrease Elements To Make Array Zigzag	★★	iterative
✔	1145	Binary Tree Coloring Game	★★	recursive
✔	1146	Snapshot Array	★★	binary_search
✔	1147	Longest Chunked Palindrome Decomposition	★★★	greedy_with_rolling_hash
✔	1154	Day of the Year	★	pre_computed_sums
✔	1155	Number of Dice Rolls With Target Sum	★★	dynamic_programming
✔	1156	Swap For Longest Repeated Character Substring	★★	iterative
✔	1157	Online Majority Element In Subarray	★★★	segment_tree_and_binary_search
✔	1160	Find Words That Can Be Formed by Characters	★	iterative
✔	1161	Maximum Level Sum of a Binary Tree	★★	bfs
✔	1162	As Far from Land as Possible	★★	bfs dynamic_programming
✔	1163	Last Substring in Lexicographical Order	★★★	iterative
✔	1169	Invalid Transactions	★★	sliding_window
✔	1170	Compare Strings by Frequency of the Smallest Character	★★	binary_search cumulative_sum
✔	1171	Remove Zero Sum Consecutive Nodes from Linked List	★★	greedy
✔	1172	Dinner Plate Stacks	★★★	heap
✔	1175	Prime Arrangements	★	on_the_fly pre_computed
✔	1177	Can Make Palindrome from Substring	★★	iterative
✔	1178	Number of Valid Words for Each Puzzle	★★★	trie
✔	1184	Distance Between Bus Stops	★	iterative
✔	1185	Day of the Week	★	sakamoto_s_methods
✔	1186	Maximum Subarray Sum with One Deletion	★★	iterative
✔	1187	Make Array Strictly Increasing	★★★	dynamic_programming
✔	1189	Maximum Number of Balloons	★	count_letters
✔	1190	Reverse Substrings Between Each Pair of Parentheses	★★	two_passes
✔	1191	K-Concatenation Maximum Sum	★★	mathematical
✔	1192	Critical Connections in a Network	★★★	dfs dfs_2
✔	1200	Minimum Absolute Difference	★	sort_and_check
✔	1201	Ugly Number III	★★	binary_search binary_search_2
✔	1202	Smallest String With Swaps	★★	connected_components
✔	1203	Sort Items by Groups Respecting Dependencies	★★★	topological_sorting
✔	1206	Design Skiplist	★★★	vanilla vanilla_low_memory vanilla_rand
✔	1207	Unique Number of Occurrences	★	hash_map_and_hash_set
✔	1208	Get Equal Substrings Within Budget	★★	sliding_window sliding_window_2
✔	1209	Remove All Adjacent Duplicates in String II	★★	stack
✔	1210	Minimum Moves to Reach Target with Rotations	★★★	dynamic_programming
✔	1217	Minimum Cost to Move Chips to The Same Position	★	mathematical mathematical_2
✔	1218	Longest Arithmetic Subsequence of Given Difference	★★	dynamic_programming
✔	1219	Path with Maximum Gold	★★	backtracking
✔	1220	Count Vowels Permutation	★★★	matrix_multiplication
✔	1221	Split a String in Balanced Strings	★	greedy
✔	1222	Queens That Can Attack the King	★★	iterative
✔	1223	Dice Roll Simulation	★★★	dynamic_programming
✔	1224	Maximum Equal Frequency	★★★	iterative
✔	1227	Airplane Seat Assignment Probability	★★	mathematical
✔	1232	Check If It Is a Straight Line	★	check_gradient
✔	1233	Remove Sub-Folders from the Filesystem	★★	dfs
✔	1234	Replace the Substring for Balanced String	★★	sliding_window
✔	1235	Maximum Profit in Job Scheduling	★★★	iterative
✔	1237	Find Positive Integer Solution for a Given Equation	★★	iterative
✔	1238	Circular Permutation in Binary Representation	★★	gray_code
✔	1239	Maximum Length of a Concatenated String with Unique Characters	★★	dfs
✔	1240	Tiling a Rectangle with the Fewest Squares	★★★	backtracking
✔	1247	Minimum Swaps to Make Strings Equal	★★	greedy
✔	1248	Count Number of Nice Subarrays	★★	sliding_window sliding_window_2
✔	1249	Minimum Remove to Make Valid Parentheses	★★	stack
✔	1250	Check If It Is a Good Array	★★★	iterative
✔	1252	Cells with Odd Values in a Matrix	★	mathematical
✔	1253	Reconstruct a 2-Row Binary Matrix	★★	greedy
✔	1254	Number of Closed Islands	★★	bfs
✔	1255	Maximum Score Words Formed by Letters	★★★	brute_force
✔	1260	Shift 2D Grid	★	array_rotation
✔	1261	Find Elements in a Contaminated Binary Tree	★★	iterative
✔	1262	Greatest Sum Divisible by Three	★★	dynamic_programming dynamic_programming_2 dynamic_programming_3 dynamic_programming_4
✔	1263	Minimum Moves to Move a Box to Their Target Location	★★★	bfs
✔	1266	Minimum Time Visiting All Points	★	greedy
✔	1267	Count Servers that Communicate	★★	iterative
✔	1268	Search Suggestions System	★★	trie
✔	1269	Number of Ways to Stay in the Same Place After Some Steps	★★★	dynamic_programming
✔	1275	Find Winner on a Tic Tac Toe Game	★	brute_force
✔	1276	Number of Burgers with No Waste of Ingredients	★★	mathematical
✔	1277	Count Square Submatrices with All Ones	★★	dynamic_programming
✔	1278	Palindrome Partitioning III	★★★	dynamic_programming
✔	1281	Subtract the Product and Sum of Digits of an Integer	★	iterative
✔	1282	Group the People Given the Group Size They Belong To	★★	iterative
✔	1283	Find the Smallest Divisor Given a Threshold	★★	binary_search
✔	1284	Minimum Number of Flips to Convert Binary Matrix to Zero Matrix	★★★	bfs
✔	1286	Iterator for Combination	★★	iterative
✔	1287	Element Appearing More Than 25% In Sorted Array	★	iterative
✔	1288	Remove Covered Intervals	★★	greedy greedy_2
✔	1289	Minimum Falling Path Sum II	★★★	dynamic_programming
✔	1290	Convert Binary Number in a Linked List to Integer	★	iterative iterative_2
✔	1291	Sequential Digits	★★	binary_search iterative
✔	1292	Maximum Side Length of a Square with Sum Less than or Equal to Threshold	★★	cumulative_sum
✔	1293	Shortest Path in a Grid with Obstacles Elimination	★★★	bfs
✔	1295	Find Numbers with Even Number of Digits	★	iterative
✔	1296	Divide Array in Sets of K Consecutive Numbers	★★	iterative
✔	1297	Maximum Number of Occurrences of a Substring	★★	sliding_window
✔	1298	Maximum Candies You Can Get from Boxes	★★★	dfs
✔	1299	Replace Elements with Greatest Element on Right Side	★	iterative
✔	1300	Sum of Mutated Array Closest to Target	★★	iterative
✔	1301	Number of Paths with Max Score	★★★	dynamic_programming
✔	1302	Deepest Leaves Sum	★★	bfs
✔	1304	Find N Unique Integers Sum up to Zero	★	iterative iterative_2
✔	1305	All Elements in Two Binary Search Trees	★★	merge_iterators
✔	1306	Jump Game III	★★	bfs
✔	1307	Verbal Arithmetic Puzzle	★★★	brute_force dfs
✔	1309	Decrypt String from Alphabet to Integer Mapping	★	iterative
✔	1310	XOR Queries of a Subarray	★★	iterative
✔	1311	Get Watched Videos by Your Friends	★★	bfs
✔	1312	Minimum Insertion Steps to Make a String Palindrome	★★★	dynamic_programming memoized_dynamic_programming
✔	1313	Decompress Run-Length Encoded List	★	iterative
✔	1314	Matrix Block Sum	★★	cumulative_sum
✔	1315	Sum of Nodes with Even-Valued Grandparent	★★	recursive recursive_2
✔	1316	Distinct Echo Substrings	★★★	sliding
✔	1317	Convert Integer to the Sum of Two No-Zero Integers	★	iterative
✔	1318	Minimum Flips to Make a OR b Equal to c	★★	bit_manipulation
✔	1319	Number of Operations to Make Network Connected	★★	bfs
✔	1320	Minimum Distance to Type a Word Using Two Fingers	★★★	dijkstras_algorithm dynamic_programming
✔	1323	Maximum 69 Number	★	iterative
✔	1324	Print Words Vertically	★★	iterative
✔	1325	Delete Leaves With a Given Value	★★	recursive
✔	1326	Minimum Number of Taps to Open to Water a Garden	★★★	greedy
✔	1328	Break a Palindrome	★★	greedy
✔	1329	Sort the Matrix Diagonally	★★	brute_force
✔	1330	Reverse Subarray To Maximize Array Value	★★★	mathematical
✔	1331	Rank Transform of an Array	★	hash_map
✔	1332	Remove Palindromic Subsequences	★	iterative
✔	1333	Filter Restaurants by Vegan-Friendly, Price and Distance	★★	iterative
✔	1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	★★	floyd_warshall_algorithm
✔	1335	Minimum Difficulty of a Job Schedule	★★★	dynamic_programming
✔	1337	The K Weakest Rows in a Matrix	★	binary_heap quick_select
✔	1338	Reduce Array Size to The Half	★★	greedy
✔	1339	Maximum Product of Splitted Binary Tree	★★	recursive
✔	1340	Jump Game V	★★★	dfs
✔	1342	Number of Steps to Reduce a Number to Zero	★	brute_force brute_force_2
✔	1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	★★	iterative
✔	1344	Angle Between Hands of a Clock	★★	mathematical
✔	1345	Jump Game IV	★★★	bfs
✔	1346	Check If N and Its Double Exist	★	hash_set
✔	1347	Minimum Number of Steps to Make Two Strings Anagram	★★	iterative
✔	1348	Tweet Counts Per Frequency	★★	iterative
✔	1349	Maximum Students Taking Exam	★★★	dynamic_programming
✔	1351	Count Negative Numbers in a Sorted Matrix	★	iterative iterative_2
✔	1352	Product of the Last K Numbers	★★	cumulative_product
✔	1353	Maximum Number of Events That Can Be Attended	★★	greedy_binary_heap
✔	1354	Construct Target Array With Multiple Sums	★★★	restore_original_state
✔	1356	Sort Integers by The Number of 1 Bits	★	cheating
✔	1357	Apply Discount Every n Orders	★★	standard
✔	1358	Number of Substrings Containing All Three Characters	★★	sliding_window
✔	1359	Count All Valid Pickup and Delivery Options	★★★	mathematical
✔	1360	Number of Days Between Two Dates	★	mathematical
✔	1361	Validate Binary Tree Nodes	★★	dfs
✔	1362	Closest Divisors	★★	iterative
✔	1363	Largest Multiple of Three	★★★	greedy
✔	1365	How Many Numbers Are Smaller Than the Current Number	★	hash_map
✔	1366	Rank Teams by Votes	★★	iterative
✔	1367	Linked List in Binary Tree	★★	kmp kmp_2
✔	1368	Minimum Cost to Make at Least One Valid Path in a Grid	★★★	bfs
✔	1370	Increasing Decreasing String	★	iterative
✔	1371	Find the Longest Substring Containing Vowels in Even Counts	★★	iterative
✔	1372	Longest ZigZag Path in a Binary Tree	★★	recursive
✔	1373	Maximum Sum BST in Binary Tree	★★★	recursive
✔	1374	Generate a String With Characters That Have Odd Counts	★	iterative
✔	1375	Number of Times Binary String Is Prefix-Aligned	★★	iterative
✔	1376	Time Needed to Inform All Employees	★★	memoized_dynamic_programming
✔	1377	Frog Position After T Seconds	★★★	dfs
	1379	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	★
✔	1380	Lucky Numbers in a Matrix	★	mathematical
✔	1381	Design a Stack With Increment Operation	★★	lazy
✔	1382	Balance a Binary Search Tree	★★	iterator rebuild_from_scratch
✔	1383	Maximum Performance of a Team	★★★	binary_heap
✔	1385	Find the Distance Value Between Two Arrays	★	binary_search buckets
✔	1386	Cinema Seat Allocation	★★	iterative
✔	1387	Sort Integers by The Power Value	★★	quick_select_and_memoized_dynamic_programming
✔	1388	Pizza With 3n Slices	★★★	dynamic_programming
✔	1389	Create Target Array in the Given Order	★	brute_force merge_sort
✔	1390	Four Divisors	★★	brute_force
✔	1391	Check if There is a Valid Path in a Grid	★★	iterative
✔	1392	Longest Happy Prefix	★★★	iterative
✔	1394	Find Lucky Integer in an Array	★	brute_force
✔	1395	Count Number of Teams	★★	merge_sort
✔	1396	Design Underground System	★★	standard
✔	1397	Find All Good Strings	★★★	memoized_dynamic_programming_with_kmp
✔	1399	Count Largest Group	★	brute_force
✔	1400	Construct K Palindrome Strings	★★	mathematical
✔	1401	Circle and Rectangle Overlapping	★★	mathematical
✔	1402	Reducing Dishes	★★★	greedy greedy_binary_heap
✔	1403	Minimum Subsequence in Non-Increasing Order	★	greedy_binary_heap
✔	1404	Number of Steps to Reduce a Number in Binary Representation to One	★★	iterative
✔	1405	Longest Happy String	★★	greedy
✔	1406	Stone Game III	★★★	dynamic_programming
✔	1408	String Matching in an Array	★	brute_force
✔	1409	Queries on a Permutation With Key	★★	fenwick_tree
✔	1410	HTML Entity Parser	★★	look_ahead state_machine state_machine_2
✔	1411	Number of Ways to Paint N × 3 Grid	★★★	dynamic_programming matrix_multiplication
✔	1413	Minimum Value to Get Positive Step by Step Sum	★	iterative
✔	1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	★★	greedy
✔	1415	The k-th Lexicographical String of All Happy Strings of Length n	★★	mathematical
✔	1416	Restore The Array	★★★	dynamic_programming
✔	1417	Reformat The String	★	iterative
✔	1418	Display Table of Food Orders in a Restaurant	★★	hash_map
✔	1419	Minimum Number of Frogs Croaking	★★	iterative
✔	1420	Build Array Where You Can Find The Maximum Exactly K Comparisons	★★★	dynamic_programming
✔	1422	Maximum Score After Splitting a String	★	iterative
✔	1423	Maximum Points You Can Obtain from Cards	★★	sliding_window
✔	1424	Diagonal Traverse II	★★	bfs bfs_2
✔	1425	Constrained Subsequence Sum	★★★	sliding_window_maximum
✔	1431	Kids With the Greatest Number of Candies	★	iterative
✔	1432	Max Difference You Can Get From Changing an Integer	★★	greedy greedy_2
✔	1433	Check If a String Can Break Another String	★★	compare_count sort_and_compare
✔	1434	Number of Ways to Wear Different Hats to Each Other	★★★	dynamic_programming memoized_dynamic_programming
✔	1436	Destination City	★	hash_set
✔	1437	Check If All 1's Are at Least Length K Places Away	★	iterative iterative_2
✔	1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	★★	monotonic_stacks
✔	1439	Find the Kth Smallest Sum of a Matrix With Sorted Rows	★★★	binary_heap
✔	1441	Build an Array With Stack Operations	★★	iterative iterative_2
✔	1442	Count Triplets That Can Form Two Arrays of Equal XOR	★★	iterative
✔	1443	Minimum Time to Collect All Apples in a Tree	★★	dfs
✔	1444	Number of Ways of Cutting a Pizza	★★★	dynamic_programming
✔	1446	Consecutive Characters	★	iterative
✔	1447	Simplified Fractions	★★	brute_force
✔	1448	Count Good Nodes in Binary Tree	★★	recursive
✔	1449	Form Largest Integer With Digits That Add up to Target	★★★	dynamic_programming
✔	1450	Number of Students Doing Homework at a Given Time	★	iterative
✔	1451	Rearrange Words in a Sentence	★★	iterative
✔	1452	People Whose List of Favorite Companies Is Not a Subset of Another List	★★	hash_set
✔	1453	Maximum Number of Darts Inside of a Circular Dartboard	★★★	angular_sweep
✔	1455	Check If a Word Occurs As a Prefix of Any Word in a Sentence	★	iterative
✔	1456	Maximum Number of Vowels in a Substring of Given Length	★★	sliding_window
✔	1457	Pseudo-Palindromic Paths in a Binary Tree	★★	recursive
✔	1458	Max Dot Product of Two Subsequences	★★★	dynamic_programming
✔	1460	Make Two Arrays Equal by Reversing Subarrays	★	iterative
✔	1461	Check If a String Contains All Binary Codes of Size K	★★	iterative
✔	1462	Course Schedule IV	★★	floyd_warshall iterative_dfs recursive_dfs
✔	1463	Cherry Pickup II	★★★	dynamic_programming
✔	1464	Maximum Product of Two Elements in an Array	★	iterative
✔	1465	Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts	★★	greedy
✔	1466	Reorder Routes to Make All Paths Lead to the City Zero	★★	dfs
✔	1467	Probability of a Two Boxes Having The Same Number of Distinct Balls	★★★	dynamic_programming
✔	1470	Shuffle the Array	★	quick_select
✔	1471	The k Strongest Values in an Array	★★	reuse_upper_bits
✔	1472	Design Browser History	★★	stack
✔	1473	Paint House III	★★★	dynamic_programming
✔	1475	Final Prices With a Special Discount in a Shop	★	monotonic_stack
✔	1476	Subrectangle Queries	★★	stack_updates
✔	1477	Find Two Non-overlapping Sub-arrays Each With Target Sum	★★	cached_sliding_window sliding_window
✔	1478	Allocate Mailboxes	★★★	dynamic_programming
✔	1480	Running Sum of 1d Array	★	iterative
✔	1481	Least Number of Unique Integers after K Removals	★★	greedy
✔	1482	Minimum Number of Days to Make m Bouquets	★★	binary_search binary_search_2
✔	1483	Kth Ancestor of a Tree Node	★★★	binary_lifting
✔	1486	XOR Operation in an Array	★	bit_manipulation
✔	1487	Making File Names Unique	★★	hash_map
✔	1488	Avoid Flood in The City	★★	binary_heap btree_set
✔	1489	Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree	★★★	kruskal
✔	1491	Average Salary Excluding the Minimum and Maximum Salary	★	iterative
✔	1492	The kth Factor of n	★★	iterative
✔	1493	Longest Subarray of 1's After Deleting One Element	★★	sliding_window
✔	1494	Parallel Courses II	★★★	memoized_dynamic_programming
✔	1496	Path Crossing	★	hash_set
✔	1497	Check If Array Pairs Are Divisible by k	★★	buckets
✔	1498	Number of Subsequences That Satisfy the Given Sum Condition	★★	two_pointers
✔	1499	Max Value of Equation	★★★	monotonic_stack
✔	1502	Can Make Arithmetic Progression From Sequence	★	pigeonhole
✔	1503	Last Moment Before All Ants Fall Out of a Plank	★★	greedy
✔	1504	Count Submatrices With All Ones	★★	monotonic_stack monotonic_stack_2 monotonic_stack_3
✔	1505	Minimum Possible Integer After at Most K Adjacent Swaps On Digits	★★★	fenwick_tree
✔	1507	Reformat Date	★	parsing
✔	1508	Range Sum of Sorted Subarray Sums	★★	binary_heap binary_search
✔	1509	Minimum Difference Between Largest and Smallest Value in Three Moves	★★	sliding_window
✔	1510	Stone Game IV	★★★	memoized_dynamic_programming
✔	1512	Number of Good Pairs	★	iterative
✔	1513	Number of Substrings With Only 1s	★★	iterative
✔	1514	Path with Maximum Probability	★★	dijkstra dijkstra_2
✔	1515	Best Position for a Service Centre	★★★	geometric_median
✔	1518	Water Bottles	★	mathematical
✔	1519	Number of Nodes in the Sub-Tree With the Same Label	★★	dfs
✔	1520	Maximum Number of Non-Overlapping Substrings	★★★	sliding_window_and_greedy
✔	1521	Find a Value of a Mysterious Function Closest to Target	★★★	sliding_window sliding_window_masked
✔	1523	Count Odd Numbers in an Interval Range	★	mathematical mathematical_2
✔	1524	Number of Sub-arrays With Odd Sum	★★	iterative
✔	1525	Number of Good Ways to Split a String	★★	iterative
✔	1526	Minimum Number of Increments on Subarrays to Form a Target Array	★★★	greedy
✔	1528	Shuffle String	★	iterative
✔	1529	Minimum Suffix Flips	★★	greedy greedy_2
✔	1530	Number of Good Leaf Nodes Pairs	★★	recursive
✔	1531	String Compression II	★★★	dynamic_programming
✔	1534	Count Good Triplets	★	brute_force brute_force_2
✔	1535	Find the Winner of an Array Game	★★	simulation
✔	1536	Minimum Swaps to Arrange a Binary Grid	★★	greedy
✔	1537	Get the Maximum Score	★★★	greedy state_matchine tail_recursive
✔	1539	Kth Missing Positive Number	★	binary_search
✔	1540	Can Convert String in K Moves	★★	buckets
✔	1541	Minimum Insertions to Balance a Parentheses String	★★	stack
✔	1542	Find Longest Awesome Substring	★★★	iterative
✔	1544	Make The String Great	★	stack
✔	1545	Find Kth Bit in Nth Binary String	★★	iterative mathematical
✔	1546	Maximum Number of Non-Overlapping Subarrays With Sum Equals Target	★★	greedy
✔	1547	Minimum Cost to Cut a Stick	★★★	dynamic_programming dynamic_programming_2
✔	1550	Three Consecutive Odds	★	iterative
✔	1551	Minimum Operations to Make Array Equal	★★	mathematical
✔	1552	Magnetic Force Between Two Balls	★★	binary_search
✔	1553	Minimum Number of Days to Eat N Oranges	★★★	memoized_dynamic_programming memoized_dynamic_programming_2 memoized_dynamic_programming_3
✔	1556	Thousand Separator	★	iterative
✔	1557	Minimum Number of Vertices to Reach All Nodes	★★	find_node_without_incoming_edges
✔	1558	Minimum Numbers of Function Calls to Make Target Array	★★	count_bits
✔	1559	Detect Cycles in 2D Grid	★★	dfs
✔	1560	Most Visited Sector in a Circular Track	★	mathematical
✔	1561	Maximum Number of Coins You Can Get	★★	greedy
✔	1562	Find Latest Group of Size M	★★	iterative
✔	1563	Stone Game V	★★★	dynamic_programming
✔	1566	Detect Pattern of Length M Repeated K or More Times	★	iterative
✔	1567	Maximum Length of Subarray With Positive Product	★★	iterative iterative_2
✔	1568	Minimum Number of Days to Disconnect Island	★★★	articulation_point
✔	1569	Number of Ways to Reorder Array to Get Same BST	★★★	recursive
✔	1572	Matrix Diagonal Sum	★	iterative
✔	1573	Number of Ways to Split a String	★★	iterative
✔	1574	Shortest Subarray to be Removed to Make Array Sorted	★★	sliding_window
✔	1575	Count All Possible Routes	★★★	dynamic_programming
✔	1576	Replace All ?'s to Avoid Consecutive Repeating Characters	★	iterative
✔	1577	Number of Ways Where Square of Number Is Equal to Product of Two Numbers	★★	hash_map
✔	1578	Minimum Time to Make Rope Colorful	★★	greedy
✔	1579	Remove Max Number of Edges to Keep Graph Fully Traversable	★★★	greedy_kruskal
✔	1582	Special Positions in a Binary Matrix	★	iterative
✔	1583	Count Unhappy Friends	★★	brute_force
✔	1584	Min Cost to Connect All Points	★★	greedy_kruskal greedy_prim
✔	1585	Check If String Is Transformable With Substring Sort Operations	★★★	iterative
✔	1588	Sum of All Odd Length Subarrays	★	mathematical
✔	1589	Maximum Sum Obtained of Any Permutation	★★	greedy
✔	1590	Make Sum Divisible by P	★★	cumulative_sum
✔	1591	Strange Printer II	★★★	cycle_detection
✔	1592	Rearrange Spaces Between Words	★	iterative
✔	1593	Split a String Into the Max Number of Unique Substrings	★★	backtracking
✔	1594	Maximum Non Negative Product in a Matrix	★★	dynamic_programming
	1595	Minimum Cost to Connect Two Groups of Points	★★★
✔	1598	Crawler Log Folder	★	stack
✔	1599	Maximum Profit of Operating a Centennial Wheel	★★	iterative
✔	1600	Throne Inheritance	★★	dfs
	1601	Maximum Number of Achievable Transfer Requests	★★★
✔	1603	Design Parking System	★	naive
✔	1604	Alert Using Same Key-Card Three or More Times in a One Hour Period	★★	sliding_window
✔	1605	Find Valid Matrix Given Row and Column Sums	★★	iterative
✔	1606	Find Servers That Handled Most Number of Requests	★★★	binary_heap
✔	1608	Special Array With X Elements Greater Than or Equal X	★	binary_heap
✔	1609	Even Odd Tree	★★	recursive
✔	1610	Maximum Number of Visible Points	★★★	sliding_window sliding_window_2
✔	1611	Minimum One Bit Operations to Make Integers Zero	★★★	gray_code
✔	1614	Maximum Nesting Depth of the Parentheses	★	stack
✔	1615	Maximal Network Rank	★★	brute_force
✔	1616	Split Two Strings to Make Palindrome	★★	greedy
✔	1617	Count Subtrees With Max Distance Between Cities	★★★	brute_force
✔	1619	Mean of Array After Removing Some Elements	★	quick_select
✔	1620	Coordinate With Maximum Network Quality	★★	brute_force
✔	1621	Number of Sets of K Non-Overlapping Line Segments	★★	combinations
	1622	Fancy Sequence	★★★
✔	1624	Largest Substring Between Two Equal Characters	★	iterative
	1625	Lexicographically Smallest String After Applying Operations	★★
	1626	Best Team With No Conflicts	★★
	1627	Graph Connectivity With Threshold	★★★
✔	1629	Slowest Key	★	iterative
✔	1630	Arithmetic Subarrays	★★	iterative
✔	1631	Path With Minimum Effort	★★	dijkstra
	1632	Rank Transform of a Matrix	★★★
✔	1636	Sort Array by Increasing Frequency	★	iterative
✔	1637	Widest Vertical Area Between Two Points Containing No Points	★★	greedy
	1638	Count Substrings That Differ by One Character	★★
	1639	Number of Ways to Form a Target String Given a Dictionary	★★★
✔	1640	Check Array Formation Through Concatenation	★	map
✔	1641	Count Sorted Vowel Strings	★★	mathematical
✔	1642	Furthest Building You Can Reach	★★	binary_heap
	1643	Kth Smallest Instructions	★★★
✔	1646	Get Maximum in Generated Array	★	iterative
✔	1647	Minimum Deletions to Make Character Frequencies Unique	★★	iterative
	1648	Sell Diminishing-Valued Colored Balls	★★
	1649	Create Sorted Array through Instructions	★★★
✔	1652	Defuse the Bomb	★	iterative
✔	1653	Minimum Deletions to Make String Balanced	★★	dynamic_programming dynamic_programming_2
	1654	Minimum Jumps to Reach Home	★★
	1655	Distribute Repeating Integers	★★★
✔	1656	Design an Ordered Stream	★	vec_deque
✔	1657	Determine if Two Strings Are Close	★★	iterative
✔	1658	Minimum Operations to Reduce X to Zero	★★	sliding_window sliding_window_2
	1659	Maximize Grid Happiness	★★★
✔	1662	Check If Two String Arrays are Equivalent	★	flatten_iterator
✔	1663	Smallest String With A Given Numeric Value	★★	mathematical
✔	1664	Ways to Make a Fair Array	★★	iterative iterative_2
✔	1665	Minimum Initial Energy to Finish Tasks	★★★	greedy
	1668	Maximum Repeating Substring	★
✔	1669	Merge In Between Linked Lists	★★	iterative
✔	1670	Design Front Middle Back Queue	★★	two_deques
	1671	Minimum Number of Removals to Make Mountain Array	★★★
✔	1672	Richest Customer Wealth	★	iterator
✔	1673	Find the Most Competitive Subsequence	★★	monotonic_stack
	1674	Minimum Moves to Make Array Complementary	★★
	1675	Minimize Deviation in Array	★★★
✔	1678	Goal Parser Interpretation	★	iterative
✔	1679	Max Number of K-Sum Pairs	★★	hash_map
	1680	Concatenation of Consecutive Binary Numbers	★★
	1681	Minimum Incompatibility	★★★
✔	1684	Count the Number of Consistent Strings	★	bit_manipulation
✔	1685	Sum of Absolute Differences in a Sorted Array	★★	iterative iterative_2
✔	1686	Stone Game VI	★★	greedy
	1687	Delivering Boxes from Storage to Ports	★★★
✔	1688	Count of Matches in Tournament	★	mathematical
✔	1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	★★	greedy
✔	1690	Stone Game VII	★★	dynamic_programming
	1691	Maximum Height by Stacking Cuboids	★★★
✔	1694	Reformat Phone Number	★	iterative
✔	1695	Maximum Erasure Value	★★	cumulative_sum sliding_window
	1696	Jump Game VI	★★
	1697	Checking Existence of Edge Length Limited Paths	★★★
✔	1700	Number of Students Unable to Eat Lunch	★	simulation
✔	1701	Average Waiting Time	★★	greedy
✔	1702	Maximum Binary String After Change	★★	greedy
	1703	Minimum Adjacent Swaps for K Consecutive Ones	★★★
✔	1704	Determine if String Halves Are Alike	★	iterative
	1705	Maximum Number of Eaten Apples	★★
✔	1706	Where Will the Ball Fall	★★	iterative
	1707	Maximum XOR With an Element From Array	★★★
✔	1710	Maximum Units on a Truck	★	greedy_binary_heap greedy_quick_select
✔	1711	Count Good Meals	★★	hash_map
✔	1712	Ways to Split Array Into Three Subarrays	★★	sliding_window
	1713	Minimum Operations to Make a Subsequence	★★★
✔	1716	Calculate Money in Leetcode Bank	★	mathematical
	1717	Maximum Score From Removing Substrings	★★
	1718	Construct the Lexicographically Largest Valid Sequence	★★
	1719	Number Of Ways To Reconstruct A Tree	★★★
✔	1720	Decode XORed Array	★	iterative iterative_2
✔	1721	Swapping Nodes in a Linked List	★★	iterative
	1722	Minimize Hamming Distance After Swap Operations	★★
	1723	Find Minimum Time to Finish All Jobs	★★★
✔	1725	Number Of Rectangles That Can Form The Largest Square	★	iterative
✔	1726	Tuple with Same Product	★★	hash_map
	1727	Largest Submatrix With Rearrangements	★★
	1728	Cat and Mouse II	★★★
✔	1732	Find the Highest Altitude	★	iterative
	1733	Minimum Number of People to Teach	★★
✔	1734	Decode XORed Permutation	★★	iterative
	1735	Count Ways to Make Array With Product	★★★
✔	1736	Latest Time by Replacing Hidden Digits	★	brute_force
	1737	Change Minimum Characters to Satisfy One of Three Conditions	★★
✔	1738	Find Kth Largest XOR Coordinate Value	★★	iterative iterative_2
	1739	Building Boxes	★★★
✔	1742	Maximum Number of Balls in a Box	★	iterative
✔	1743	Restore the Array From Adjacent Pairs	★★	dfs
	1744	Can You Eat Your Favorite Candy on Your Favorite Day?	★★
	1745	Palindrome Partitioning IV	★★★
✔	1748	Sum of Unique Elements	★	iterative iterative_2 iterative_3
✔	1749	Maximum Absolute Sum of Any Subarray	★★	iterative iterative_2
	1750	Minimum Length of String After Deleting Similar Ends	★★
	1751	Maximum Number of Events That Can Be Attended II	★★★
✔	1752	Check if Array Is Sorted and Rotated	★	iterative
✔	1753	Maximum Score From Removing Stones	★★	greedy
	1754	Largest Merge Of Two Strings	★★
	1755	Closest Subsequence Sum	★★★
✔	1758	Minimum Changes To Make Alternating Binary String	★	dynamic_programming iterative
✔	1759	Count Number of Homogenous Substrings	★★	greedy
	1760	Minimum Limit of Balls in a Bag	★★
	1761	Minimum Degree of a Connected Trio in a Graph	★★★
	1763	Longest Nice Substring	★
	1764	Form Array by Concatenating Subarrays of Another Array	★★
✔	1765	Map of Highest Peak	★★	bfs
	1766	Tree of Coprimes	★★★
✔	1768	Merge Strings Alternately	★	iterative
✔	1769	Minimum Number of Operations to Move All Balls to Each Box	★★	iterative iterative_2
	1770	Maximum Score from Performing Multiplication Operations	★★★
	1771	Maximize Palindrome Length From Subsequences	★★★
✔	1773	Count Items Matching a Rule	★	iterative
	1774	Closest Dessert Cost	★★
	1775	Equal Sum Arrays With Minimum Number of Operations	★★
	1776	Car Fleet II	★★★
✔	1779	Find Nearest Point That Has the Same X or Y Coordinate	★	iterative
✔	1780	Check if Number is a Sum of Powers of Three	★★	ternary_number
✔	1781	Sum of Beauty of All Substrings	★★	brute_force
	1782	Count Pairs Of Nodes	★★★
✔	1784	Check if Binary String Has at Most One Segment of Ones	★	iterative
✔	1785	Minimum Elements to Add to Form a Given Sum	★★	mathematical
	1786	Number of Restricted Paths From First to Last Node	★★
	1787	Make the XOR of All Segments Equal to Zero	★★★
✔	1790	Check if One String Swap Can Make Strings Equal	★	iterative
✔	1791	Find Center of Star Graph	★	mathematical
	1792	Maximum Average Pass Ratio	★★
	1793	Maximum Score of a Good Subarray	★★★
✔	1796	Second Largest Digit in a String	★	iterative
	1797	Design Authentication Manager	★★
	1798	Maximum Number of Consecutive Values You Can Make	★★
	1799	Maximize Score After N Operations	★★★
✔	1800	Maximum Ascending Subarray Sum	★	iterative
	1801	Number of Orders in the Backlog	★★
	1802	Maximum Value at a Given Index in a Bounded Array	★★
	1803	Count Pairs With XOR in a Range	★★★
✔	1805	Number of Different Integers in a String	★	iterative iterative_2
	1806	Minimum Number of Operations to Reinitialize a Permutation	★★
✔	1807	Evaluate the Bracket Pairs of a String	★★	iterative
	1808	Maximize Number of Nice Divisors	★★★
✔	1812	Determine Color of a Chessboard Square	★	mathematical
	1813	Sentence Similarity III	★★
✔	1814	Count Nice Pairs in an Array	★★	hash_map
	1815	Maximum Number of Groups Getting Fresh Donuts	★★★
✔	1816	Truncate Sentence	★	iterative
✔	1817	Finding the Users Active Minutes	★★	hash_map_and_hash_set
✔	1818	Minimum Absolute Sum Difference	★★	binary_search
	1819	Number of Different Subsequences GCDs	★★★
✔	1822	Sign of the Product of an Array	★	iterative
	1823	Find the Winner of the Circular Game	★★
✔	1824	Minimum Sideway Jumps	★★	dynamic_programming
	1825	Finding MK Average	★★★
✔	1827	Minimum Operations to Make the Array Increasing	★	iterative
	1828	Queries on Number of Points Inside a Circle	★★
	1829	Maximum XOR for Each Query	★★
	1830	Minimum Number of Operations to Make String Sorted	★★★
✔	1832	Check if the Sentence Is Pangram	★	bit_manipulation
✔	1833	Maximum Ice Cream Bars	★★	counting_sort
	1834	Single-Threaded CPU	★★
	1835	Find XOR Sum of All Pairs Bitwise AND	★★★
✔	1837	Sum of Digits in Base K	★	iterative
	1838	Frequency of the Most Frequent Element	★★
✔	1839	Longest Substring Of All Vowels in Order	★★	state_machine
	1840	Maximum Building Height	★★★
✔	1844	Replace All Digits with Characters	★	iterative
✔	1845	Seat Reservation Manager	★★	binary_heap lazy_binary_heap
✔	1846	Maximum Element After Decreasing and Rearranging	★★	greedy
	1847	Closest Room	★★★
✔	1848	Minimum Distance to the Target Element	★	iterative
	1849	Splitting a String Into Descending Consecutive Values	★★
	1850	Minimum Adjacent Swaps to Reach the Kth Smallest Number	★★
	1851	Minimum Interval to Include Each Query	★★★
✔	1854	Maximum Population Year	★	iterative
✔	1855	Maximum Distance Between a Pair of Values	★★	two_pointers two_pointers_2
	1856	Maximum Subarray Min-Product	★★
	1857	Largest Color Value in a Directed Graph	★★★
✔	1859	Sorting the Sentence	★	iterative
	1860	Incremental Memory Leak	★★
	1861	Rotating the Box	★★
	1862	Sum of Floored Pairs	★★★
	1863	Sum of All Subset XOR Totals	★
	1864	Minimum Number of Swaps to Make the Binary String Alternating	★★
	1865	Finding Pairs With a Certain Sum	★★
	1866	Number of Ways to Rearrange Sticks With K Sticks Visible	★★★
	1869	Longer Contiguous Segments of Ones than Zeros	★
	1870	Minimum Speed to Arrive on Time	★★
	1871	Jump Game VII	★★
	1872	Stone Game VIII	★★★
	1876	Substrings of Size Three with Distinct Characters	★
	1877	Minimize Maximum Pair Sum in Array	★★
	1878	Get Biggest Three Rhombus Sums in a Grid	★★
	1879	Minimum XOR Sum of Two Arrays	★★★
	1880	Check if Word Equals Summation of Two Words	★
	1881	Maximum Value after Insertion	★★
	1882	Process Tasks Using Servers	★★
	1883	Minimum Skips to Arrive at Meeting On Time	★★★
	1884	Egg Drop With 2 Eggs and N Floors	★★
	1886	Determine Whether Matrix Can Be Obtained By Rotation	★
	1887	Reduction Operations to Make the Array Elements Equal	★★
	1888	Minimum Number of Flips to Make the Binary String Alternating	★★
	1889	Minimum Space Wasted From Packaging	★★★
	1893	Check if All the Integers in a Range Are Covered	★
	1894	Find the Student that Will Replace the Chalk	★★
	1895	Largest Magic Square	★★
	1896	Minimum Cost to Change the Final Value of Expression	★★★
	1897	Redistribute Characters to Make All Strings Equal	★
	1898	Maximum Number of Removable Characters	★★
	1899	Merge Triplets to Form Target Triplet	★★
	1900	The Earliest and Latest Rounds Where Players Compete	★★★
	1901	Find a Peak Element II	★★
	1903	Largest Odd Number in String	★
	1904	The Number of Full Rounds You Have Played	★★
	1905	Count Sub Islands	★★
	1906	Minimum Absolute Difference Queries	★★
	1909	Remove One Element to Make the Array Strictly Increasing	★
	1910	Remove All Occurrences of a Substring	★★
	1911	Maximum Alternating Subsequence Sum	★★
	1912	Design Movie Rental System	★★★
	1913	Maximum Product Difference Between Two Pairs	★
	1914	Cyclically Rotating a Grid	★★
	1915	Number of Wonderful Substrings	★★
	1916	Count Ways to Build Rooms in an Ant Colony	★★★
	1920	Build Array from Permutation	★
	1921	Eliminate Maximum Number of Monsters	★★
	1922	Count Good Numbers	★★
	1923	Longest Common Subpath	★★★
	1925	Count Square Sum Triples	★
	1926	Nearest Exit from Entrance in Maze	★★
	1927	Sum Game	★★
	1928	Minimum Cost to Reach Destination in Time	★★★
	1929	Concatenation of Array	★
	1930	Unique Length-3 Palindromic Subsequences	★★
	1931	Painting a Grid With Three Different Colors	★★★
	1932	Merge BSTs to Create Single BST	★★★
	1935	Maximum Number of Words You Can Type	★
	1936	Add Minimum Number of Rungs	★★
	1937	Maximum Number of Points with Cost	★★
	1938	Maximum Genetic Difference Query	★★★
	1941	Check if All Characters Have Equal Number of Occurrences	★
	1942	The Number of the Smallest Unoccupied Chair	★★
	1943	Describe the Painting	★★
	1944	Number of Visible People in a Queue	★★★
	1945	Sum of Digits of String After Convert	★
	1946	Largest Number After Mutating Substring	★★
	1947	Maximum Compatibility Score Sum	★★
	1948	Delete Duplicate Folders in System	★★★
	1952	Three Divisors	★
	1953	Maximum Number of Weeks for Which You Can Work	★★
	1954	Minimum Garden Perimeter to Collect Enough Apples	★★
	1955	Count Number of Special Subsequences	★★★
	1957	Delete Characters to Make Fancy String	★
	1958	Check if Move is Legal	★★
	1959	Minimum Total Space Wasted With K Resizing Operations	★★
	1960	Maximum Product of the Length of Two Palindromic Substrings	★★★
	1961	Check If String Is a Prefix of Array	★
	1962	Remove Stones to Minimize the Total	★★
	1963	Minimum Number of Swaps to Make the String Balanced	★★
	1964	Find the Longest Valid Obstacle Course at Each Position	★★★
	1967	Number of Strings That Appear as Substrings in Word	★
	1968	Array With Elements Not Equal to Average of Neighbors	★★
	1969	Minimum Non-Zero Product of the Array Elements	★★
	1970	Last Day Where You Can Still Cross	★★★
	1971	Find if Path Exists in Graph	★
	1974	Minimum Time to Type Word Using Special Typewriter	★
	1975	Maximum Matrix Sum	★★
	1976	Number of Ways to Arrive at Destination	★★
	1977	Number of Ways to Separate Numbers	★★★
	1979	Find Greatest Common Divisor of Array	★
	1980	Find Unique Binary String	★★
	1981	Minimize the Difference Between Target and Chosen Elements	★★
	1982	Find Array Given Subset Sums	★★★
	1984	Minimum Difference Between Highest and Lowest of K Scores	★
	1985	Find the Kth Largest Integer in the Array	★★
	1986	Minimum Number of Work Sessions to Finish the Tasks	★★
	1987	Number of Unique Good Subsequences	★★★
	1991	Find the Middle Index in Array	★
	1992	Find All Groups of Farmland	★★
	1993	Operations on Tree	★★
	1994	The Number of Good Subsets	★★★
	1995	Count Special Quadruplets	★
	1996	The Number of Weak Characters in the Game	★★
	1997	First Day Where You Have Been in All the Rooms	★★
	1998	GCD Sort of an Array	★★★
	2000	Reverse Prefix of Word	★
	2001	Number of Pairs of Interchangeable Rectangles	★★
	2002	Maximum Product of the Length of Two Palindromic Subsequences	★★
	2003	Smallest Missing Genetic Value in Each Subtree	★★★
	2006	Count Number of Pairs With Absolute Difference K	★
	2007	Find Original Array From Doubled Array	★★
	2008	Maximum Earnings From Taxi	★★
	2009	Minimum Number of Operations to Make Array Continuous	★★★
	2011	Final Value of Variable After Performing Operations	★
	2012	Sum of Beauty in the Array	★★
	2013	Detect Squares	★★
	2014	Longest Subsequence Repeated k Times	★★★
	2016	Maximum Difference Between Increasing Elements	★
	2017	Grid Game	★★
	2018	Check if Word Can Be Placed In Crossword	★★
	2019	The Score of Students Solving Math Expression	★★★
	2022	Convert 1D Array Into 2D Array	★
	2023	Number of Pairs of Strings With Concatenation Equal to Target	★★
	2024	Maximize the Confusion of an Exam	★★
	2025	Maximum Number of Ways to Partition an Array	★★★
	2027	Minimum Moves to Convert String	★
	2028	Find Missing Observations	★★
	2029	Stone Game IX	★★
	2030	Smallest K-Length Subsequence With Occurrences of a Letter	★★★
	2032	Two Out of Three	★
	2033	Minimum Operations to Make a Uni-Value Grid	★★
	2034	Stock Price Fluctuation	★★
	2035	Partition Array Into Two Arrays to Minimize Sum Difference	★★★
	2037	Minimum Number of Moves to Seat Everyone	★
	2038	Remove Colored Pieces if Both Neighbors are the Same Color	★★
	2039	The Time When the Network Becomes Idle	★★
	2040	Kth Smallest Product of Two Sorted Arrays	★★★
	2042	Check if Numbers Are Ascending in a Sentence	★
	2043	Simple Bank System	★★
	2044	Count Number of Maximum Bitwise-OR Subsets	★★
	2045	Second Minimum Time to Reach Destination	★★★
	2047	Number of Valid Words in a Sentence	★
	2048	Next Greater Numerically Balanced Number	★★
	2049	Count Nodes With the Highest Score	★★
	2050	Parallel Courses III	★★★
	2053	Kth Distinct String in an Array	★
	2054	Two Best Non-Overlapping Events	★★
	2055	Plates Between Candles	★★
	2056	Number of Valid Move Combinations On Chessboard	★★★
	2057	Smallest Index With Equal Value	★
	2058	Find the Minimum and Maximum Number of Nodes Between Critical Points	★★
	2059	Minimum Operations to Convert Number	★★
	2060	Check if an Original String Exists Given Two Encoded Strings	★★★
	2062	Count Vowel Substrings of a String	★
	2063	Vowels of All Substrings	★★
	2064	Minimized Maximum of Products Distributed to Any Store	★★
	2065	Maximum Path Quality of a Graph	★★★
	2068	Check Whether Two Strings are Almost Equivalent	★
	2069	Walking Robot Simulation II	★★
	2070	Most Beautiful Item for Each Query	★★
	2071	Maximum Number of Tasks You Can Assign	★★★
	2073	Time Needed to Buy Tickets	★
	2074	Reverse Nodes in Even Length Groups	★★
	2075	Decode the Slanted Ciphertext	★★
	2076	Process Restricted Friend Requests	★★★
	2078	Two Furthest Houses With Different Colors	★
	2079	Watering Plants	★★
	2080	Range Frequency Queries	★★
	2081	Sum of k-Mirror Numbers	★★★
	2085	Count Common Words With One Occurrence	★
	2086	Minimum Number of Food Buckets to Feed the Hamsters	★★
	2087	Minimum Cost Homecoming of a Robot in a Grid	★★
	2088	Count Fertile Pyramids in a Land	★★★
	2089	Find Target Indices After Sorting Array	★
	2090	K Radius Subarray Averages	★★
	2091	Removing Minimum and Maximum From Array	★★
	2092	Find All People With Secret	★★★
	2094	Finding 3-Digit Even Numbers	★
	2095	Delete the Middle Node of a Linked List	★★
	2096	Step-By-Step Directions From a Binary Tree Node to Another	★★
	2097	Valid Arrangement of Pairs	★★★
	2099	Find Subsequence of Length K With the Largest Sum	★
	2100	Find Good Days to Rob the Bank	★★
	2101	Detonate the Maximum Bombs	★★
	2102	Sequentially Ordinal Rank Tracker	★★★
	2103	Rings and Rods	★
	2104	Sum of Subarray Ranges	★★
	2105	Watering Plants II	★★
	2106	Maximum Fruits Harvested After at Most K Steps	★★★
	2108	Find First Palindromic String in the Array	★
	2109	Adding Spaces to a String	★★
	2110	Number of Smooth Descent Periods of a Stock	★★
	2111	Minimum Operations to Make the Array K-Increasing	★★★
	2114	Maximum Number of Words Found in Sentences	★
	2115	Find All Possible Recipes from Given Supplies	★★
	2116	Check if a Parentheses String Can Be Valid	★★
	2117	Abbreviating the Product of a Range	★★★
	2119	A Number After a Double Reversal	★
	2120	Execution of All Suffix Instructions Staying in a Grid	★★
	2121	Intervals Between Identical Elements	★★
	2122	Recover the Original Array	★★★
	2124	Check if All A's Appears Before All B's	★
	2125	Number of Laser Beams in a Bank	★★
	2126	Destroying Asteroids	★★
	2127	Maximum Employees to Be Invited to a Meeting	★★★
	2129	Capitalize the Title	★
	2130	Maximum Twin Sum of a Linked List	★★
	2131	Longest Palindrome by Concatenating Two Letter Words	★★
	2132	Stamping the Grid	★★★
	2133	Check if Every Row and Column Contains All Numbers	★
	2134	Minimum Swaps to Group All 1's Together II	★★
	2135	Count Words Obtained After Adding a Letter	★★
	2136	Earliest Possible Day of Full Bloom	★★★
	2138	Divide a String Into Groups of Size k	★
	2139	Minimum Moves to Reach Target Score	★★
	2140	Solving Questions With Brainpower	★★
	2141	Maximum Running Time of N Computers	★★★
	2144	Minimum Cost of Buying Candies With Discount	★
	2145	Count the Hidden Sequences	★★
	2146	K Highest Ranked Items Within a Price Range	★★
	2147	Number of Ways to Divide a Long Corridor	★★★
	2148	Count Elements With Strictly Smaller and Greater Elements	★
	2149	Rearrange Array Elements by Sign	★★
	2150	Find All Lonely Numbers in the Array	★★
	2151	Maximum Good People Based on Statements	★★★
	2154	Keep Multiplying Found Values by Two	★
	2155	All Divisions With the Highest Score of a Binary Array	★★
	2156	Find Substring With Given Hash Value	★★★
	2157	Groups of Strings	★★★
	2160	Minimum Sum of Four Digit Number After Splitting Digits	★
	2161	Partition Array According to Given Pivot	★★
	2162	Minimum Cost to Set Cooking Time	★★
	2163	Minimum Difference in Sums After Removal of Elements	★★★
	2164	Sort Even and Odd Indices Independently	★
	2165	Smallest Value of the Rearranged Number	★★
	2166	Design Bitset	★★
	2167	Minimum Time to Remove All Cars Containing Illegal Goods	★★★
	2169	Count Operations to Obtain Zero	★
	2170	Minimum Operations to Make the Array Alternating	★★
	2171	Removing Minimum Number of Magic Beans	★★
	2172	Maximum AND Sum of Array	★★★
	2176	Count Equal and Divisible Pairs in an Array	★
	2177	Find Three Consecutive Integers That Sum to a Given Number	★★
	2178	Maximum Split of Positive Even Integers	★★
	2179	Count Good Triplets in an Array	★★★
	2180	Count Integers With Even Digit Sum	★
	2181	Merge Nodes in Between Zeros	★★
	2182	Construct String With Repeat Limit	★★
	2183	Count Array Pairs Divisible by K	★★★
	2185	Counting Words With a Given Prefix	★
	2186	Minimum Number of Steps to Make Two Strings Anagram II	★★
	2187	Minimum Time to Complete Trips	★★
	2188	Minimum Time to Finish the Race	★★★
	2190	Most Frequent Number Following Key In an Array	★
	2191	Sort the Jumbled Numbers	★★
	2192	All Ancestors of a Node in a Directed Acyclic Graph	★★
	2193	Minimum Number of Moves to Make Palindrome	★★★
	2194	Cells in a Range on an Excel Sheet	★
	2195	Append K Integers With Minimal Sum	★★
	2196	Create Binary Tree From Descriptions	★★
	2197	Replace Non-Coprime Numbers in Array	★★★
	2200	Find All K-Distant Indices in an Array	★
	2201	Count Artifacts That Can Be Extracted	★★
	2202	Maximize the Topmost Element After K Moves	★★
	2203	Minimum Weighted Subgraph With the Required Paths	★★★
	2206	Divide Array Into Equal Pairs	★
	2207	Maximize Number of Subsequences in a String	★★
	2208	Minimum Operations to Halve Array Sum	★★
	2209	Minimum White Tiles After Covering With Carpets	★★★
	2210	Count Hills and Valleys in an Array	★
	2211	Count Collisions on a Road	★★
	2212	Maximum Points in an Archery Competition	★★
	2213	Longest Substring of One Repeating Character	★★★
	2215	Find the Difference of Two Arrays	★
	2216	Minimum Deletions to Make Array Beautiful	★★
	2217	Find Palindrome With Fixed Length	★★
	2218	Maximum Value of K Coins From Piles	★★★
	2220	Minimum Bit Flips to Convert Number	★
	2221	Find Triangular Sum of an Array	★★
	2222	Number of Ways to Select Buildings	★★
	2223	Sum of Scores of Built Strings	★★★
	2224	Minimum Number of Operations to Convert Time	★
	2225	Find Players With Zero or One Losses	★★
	2226	Maximum Candies Allocated to K Children	★★
	2227	Encrypt and Decrypt Strings	★★★
	2231	Largest Number After Digit Swaps by Parity	★
	2232	Minimize Result by Adding Parentheses to Expression	★★
	2233	Maximum Product After K Increments	★★
	2234	Maximum Total Beauty of the Gardens	★★★
	2235	Add Two Integers	★
	2236	Root Equals Sum of Children	★
	2239	Find Closest Number to Zero	★
	2240	Number of Ways to Buy Pens and Pencils	★★
	2241	Design an ATM Machine	★★
	2242	Maximum Score of a Node Sequence	★★★
	2243	Calculate Digit Sum of a String	★
	2244	Minimum Rounds to Complete All Tasks	★★
	2245	Maximum Trailing Zeros in a Cornered Path	★★
	2246	Longest Path With Different Adjacent Characters	★★★
	2248	Intersection of Multiple Arrays	★
	2249	Count Lattice Points Inside a Circle	★★
	2250	Count Number of Rectangles Containing Each Point	★★
	2251	Number of Flowers in Full Bloom	★★★
	2255	Count Prefixes of a Given String	★
	2256	Minimum Average Difference	★★
	2257	Count Unguarded Cells in the Grid	★★
	2258	Escape the Spreading Fire	★★★
	2259	Remove Digit From Number to Maximize Result	★
	2260	Minimum Consecutive Cards to Pick Up	★★
	2261	K Divisible Elements Subarrays	★★
	2262	Total Appeal of A String	★★★
	2264	Largest 3-Same-Digit Number in String	★
	2265	Count Nodes Equal to Average of Subtree	★★
	2266	Count Number of Texts	★★
	2267	Check if There Is a Valid Parentheses String Path	★★★
	2269	Find the K-Beauty of a Number	★
	2270	Number of Ways to Split Array	★★
	2271	Maximum White Tiles Covered by a Carpet	★★
	2272	Substring With Largest Variance	★★★
	2273	Find Resultant Array After Removing Anagrams	★
	2274	Maximum Consecutive Floors Without Special Floors	★★
	2275	Largest Combination With Bitwise AND Greater Than Zero	★★
	2276	Count Integers in Intervals	★★★
	2278	Percentage of Letter in String	★
	2279	Maximum Bags With Full Capacity of Rocks	★★
	2280	Minimum Lines to Represent a Line Chart	★★
	2281	Sum of Total Strength of Wizards	★★★
	2283	Check if Number Has Equal Digit Count and Digit Value	★
	2284	Sender With Largest Word Count	★★
	2285	Maximum Total Importance of Roads	★★
	2286	Booking Concert Tickets in Groups	★★★
	2287	Rearrange Characters to Make Target String	★
	2288	Apply Discount to Prices	★★
	2289	Steps to Make Array Non-decreasing	★★
	2290	Minimum Obstacle Removal to Reach Corner	★★★
	2293	Min Max Game	★
	2294	Partition Array Such That Maximum Difference Is K	★★
	2295	Replace Elements in an Array	★★
	2296	Design a Text Editor	★★★
	2299	Strong Password Checker II	★
	2300	Successful Pairs of Spells and Potions	★★
	2301	Match Substring After Replacement	★★★
	2302	Count Subarrays With Score Less Than K	★★★
	2303	Calculate Amount Paid in Taxes	★
	2304	Minimum Path Cost in a Grid	★★
	2305	Fair Distribution of Cookies	★★
	2306	Naming a Company	★★★
	2309	Greatest English Letter in Upper and Lower Case	★
	2310	Sum of Numbers With Units Digit K	★★
	2311	Longest Binary Subsequence Less Than or Equal to K	★★
	2312	Selling Pieces of Wood	★★★
	2315	Count Asterisks	★
	2316	Count Unreachable Pairs of Nodes in an Undirected Graph	★★
	2317	Maximum XOR After Operations	★★
	2318	Number of Distinct Roll Sequences	★★★
	2319	Check if Matrix Is X-Matrix	★
	2320	Count Number of Ways to Place Houses	★★
	2321	Maximum Score Of Spliced Array	★★★
	2322	Minimum Score After Removals on a Tree	★★★
	2325	Decode the Message	★
	2326	Spiral Matrix IV	★★
	2327	Number of People Aware of a Secret	★★
	2328	Number of Increasing Paths in a Grid	★★★
	2331	Evaluate Boolean Binary Tree	★
	2332	The Latest Time to Catch a Bus	★★
	2333	Minimum Sum of Squared Difference	★★
	2334	Subarray With Elements Greater Than Varying Threshold	★★★
	2335	Minimum Amount of Time to Fill Cups	★
	2336	Smallest Number in Infinite Set	★★
	2337	Move Pieces to Obtain a String	★★
	2338	Count the Number of Ideal Arrays	★★★
	2341	Maximum Number of Pairs in Array	★
	2342	Max Sum of a Pair With Equal Sum of Digits	★★
	2343	Query Kth Smallest Trimmed Number	★★
	2344	Minimum Deletions to Make Array Divisible	★★★
	2347	Best Poker Hand	★
	2348	Number of Zero-Filled Subarrays	★★
	2349	Design a Number Container System	★★
	2350	Shortest Impossible Sequence of Rolls	★★★
	2351	First Letter to Appear Twice	★
	2352	Equal Row and Column Pairs	★★
	2353	Design a Food Rating System	★★
	2354	Number of Excellent Pairs	★★★
	2357	Make Array Zero by Subtracting Equal Amounts	★
	2358	Maximum Number of Groups Entering a Competition	★★
	2359	Find Closest Node to Given Two Nodes	★★
	2360	Longest Cycle in a Graph	★★★
	2363	Merge Similar Items	★
	2364	Count Number of Bad Pairs	★★
	2365	Task Scheduler II	★★
	2366	Minimum Replacements to Sort the Array	★★★
	2367	Number of Arithmetic Triplets	★
	2368	Reachable Nodes With Restrictions	★★
	2369	Check if There is a Valid Partition For The Array	★★
	2370	Longest Ideal Subsequence	★★
	2373	Largest Local Values in a Matrix	★
	2374	Node With Highest Edge Score	★★
	2375	Construct Smallest Number From DI String	★★
	2376	Count Special Integers	★★★
	2379	Minimum Recolors to Get K Consecutive Black Blocks	★
	2380	Time Needed to Rearrange a Binary String	★★
	2381	Shifting Letters II	★★
	2382	Maximum Segment Sum After Removals	★★★
	2383	Minimum Hours of Training to Win a Competition	★
	2384	Largest Palindromic Number	★★
	2385	Amount of Time for Binary Tree to Be Infected	★★
	2386	Find the K-Sum of an Array	★★★
	2389	Longest Subsequence With Limited Sum	★
	2390	Removing Stars From a String	★★
	2391	Minimum Amount of Time to Collect Garbage	★★
	2392	Build a Matrix With Conditions	★★★
	2395	Find Subarrays With Equal Sum	★
	2396	Strictly Palindromic Number	★★
	2397	Maximum Rows Covered by Columns	★★
	2398	Maximum Number of Robots Within Budget	★★★
	2399	Check Distances Between Same Letters	★
	2400	Number of Ways to Reach a Position After Exactly k Steps	★★
	2401	Longest Nice Subarray	★★
	2402	Meeting Rooms III	★★★
	2404	Most Frequent Even Element	★
	2405	Optimal Partition of String	★★
	2406	Divide Intervals Into Minimum Number of Groups	★★
	2407	Longest Increasing Subsequence II	★★★
	2409	Count Days Spent Together	★
	2410	Maximum Matching of Players With Trainers	★★
	2411	Smallest Subarrays With Maximum Bitwise OR	★★
	2412	Minimum Money Required Before Transactions	★★★
	2413	Smallest Even Multiple	★
	2414	Length of the Longest Alphabetical Continuous Substring	★★
	2415	Reverse Odd Levels of Binary Tree	★★
	2416	Sum of Prefix Scores of Strings	★★★
	2418	Sort the People	★
	2419	Longest Subarray With Maximum Bitwise AND	★★
	2420	Find All Good Indices	★★
	2421	Number of Good Paths	★★★
	2423	Remove Letter To Equalize Frequency	★
	2424	Longest Uploaded Prefix	★★
	2425	Bitwise XOR of All Pairings	★★
	2426	Number of Pairs Satisfying Inequality	★★★
	2427	Number of Common Factors	★
	2428	Maximum Sum of an Hourglass	★★
	2429	Minimize XOR	★★
	2430	Maximum Deletions on a String	★★★
	2432	The Employee That Worked on the Longest Task	★
	2433	Find The Original Array of Prefix Xor	★★
	2434	Using a Robot to Print the Lexicographically Smallest String	★★
	2435	Paths in Matrix Whose Sum Is Divisible by K	★★★
	2437	Number of Valid Clock Times	★
	2438	Range Product Queries of Powers	★★
	2439	Minimize Maximum of Array	★★
	2440	Create Components With Same Value	★★★
	2441	Largest Positive Integer That Exists With Its Negative	★
	2442	Count Number of Distinct Integers After Reverse Operations	★★
	2443	Sum of Number and Its Reverse	★★
	2444	Count Subarrays With Fixed Bounds	★★★
	2446	Determine if Two Events Have Conflict	★
	2447	Number of Subarrays With GCD Equal to K	★★
	2448	Minimum Cost to Make Array Equal	★★★
	2449	Minimum Number of Operations to Make Arrays Similar	★★★
	2451	Odd String Difference	★
	2452	Words Within Two Edits of Dictionary	★★
	2453	Destroy Sequential Targets	★★
	2454	Next Greater Element IV	★★★
	2455	Average Value of Even Numbers That Are Divisible by Three	★
	2456	Most Popular Video Creator	★★
	2457	Minimum Addition to Make Integer Beautiful	★★
	2458	Height of Binary Tree After Subtree Removal Queries	★★★
	2460	Apply Operations to an Array	★
	2461	Maximum Sum of Distinct Subarrays With Length K	★★
	2462	Total Cost to Hire K Workers	★★
	2463	Minimum Total Distance Traveled	★★★
	2465	Number of Distinct Averages	★
	2466	Count Ways To Build Good Strings	★★
	2467	Most Profitable Path in a Tree	★★
	2468	Split Message Based on Limit	★★★
	2469	Convert the Temperature	★
	2470	Number of Subarrays With LCM Equal to K	★★
	2471	Minimum Number of Operations to Sort a Binary Tree by Level	★★
	2472	Maximum Number of Non-overlapping Palindrome Substrings	★★★
	2475	Number of Unequal Triplets in Array	★
	2476	Closest Nodes Queries in a Binary Search Tree	★★
	2477	Minimum Fuel Cost to Report to the Capital	★★
	2478	Number of Beautiful Partitions	★★★
	2481	Minimum Cuts to Divide a Circle	★
	2482	Difference Between Ones and Zeros in Row and Column	★★
	2483	Minimum Penalty for a Shop	★★
	2484	Count Palindromic Subsequences	★★★
	2485	Find the Pivot Integer	★
	2486	Append Characters to String to Make Subsequence	★★
	2487	Remove Nodes From Linked List	★★
	2488	Count Subarrays With Median K	★★★
	2490	Circular Sentence	★
	2491	Divide Players Into Teams of Equal Skill	★★
	2492	Minimum Score of a Path Between Two Cities	★★
	2493	Divide Nodes Into the Maximum Number of Groups	★★★
	2496	Maximum Value of a String in an Array	★
	2497	Maximum Star Sum of a Graph	★★
	2498	Frog Jump II	★★
	2499	Minimum Total Cost to Make Arrays Unequal	★★★
	2500	Delete Greatest Value in Each Row	★
	2501	Longest Square Streak in an Array	★★
	2502	Design Memory Allocator	★★
	2503	Maximum Number of Points From Grid Queries	★★★
	2506	Count Pairs Of Similar Strings	★
	2507	Smallest Value After Replacing With Sum of Prime Factors	★★
	2508	Add Edges to Make Degrees of All Nodes Even	★★★
	2509	Cycle Length Queries in a Tree	★★★
	2511	Maximum Enemy Forts That Can Be Captured	★
	2512	Reward Top K Students	★★
	2513	Minimize the Maximum of Two Arrays	★★
	2514	Count Anagrams	★★★
	2515	Shortest Distance to Target String in a Circular Array	★
	2516	Take K of Each Character From Left and Right	★★
	2517	Maximum Tastiness of Candy Basket	★★
	2518	Number of Great Partitions	★★★
	2520	Count the Digits That Divide a Number	★
	2521	Distinct Prime Factors of Product of Array	★★
	2522	Partition String Into Substrings With Values at Most K	★★
	2523	Closest Prime Numbers in Range	★★
	2525	Categorize Box According to Criteria	★
	2526	Find Consecutive Integers from a Data Stream	★★
	2527	Find Xor-Beauty of Array	★★
	2528	Maximize the Minimum Powered City	★★★
	2529	Maximum Count of Positive Integer and Negative Integer	★
	2530	Maximal Score After Applying K Operations	★★
	2531	Make Number of Distinct Characters Equal	★★
	2532	Time to Cross a Bridge	★★★
	2535	Difference Between Element Sum and Digit Sum of an Array	★
	2536	Increment Submatrices by One	★★
	2537	Count the Number of Good Subarrays	★★
	2538	Difference Between Maximum and Minimum Price Sum	★★★
	2540	Minimum Common Value	★
	2541	Minimum Operations to Make Array Equal II	★★
	2542	Maximum Subsequence Score	★★
	2543	Check if Point Is Reachable	★★★
	2544	Alternating Digit Sum	★
	2545	Sort the Students by Their Kth Score	★★
	2546	Apply Bitwise Operations to Make Strings Equal	★★
	2547	Minimum Cost to Split an Array	★★★
	2549	Count Distinct Numbers on Board	★
	2550	Count Collisions of Monkeys on a Polygon	★★
	2551	Put Marbles in Bags	★★★
	2552	Count Increasing Quadruplets	★★★
	2553	Separate the Digits in an Array	★
	2554	Maximum Number of Integers to Choose From a Range I	★★
	2555	Maximize Win From Two Segments	★★
	2556	Disconnect Path in a Binary Matrix by at Most One Flip	★★
	2558	Take Gifts From the Richest Pile	★
	2559	Count Vowel Strings in Ranges	★★
	2560	House Robber IV	★★
	2561	Rearranging Fruits	★★★
	2562	Find the Array Concatenation Value	★
	2563	Count the Number of Fair Pairs	★★
	2564	Substring XOR Queries	★★
	2565	Subsequence With the Minimum Score	★★★
	2566	Maximum Difference by Remapping a Digit	★
	2567	Minimum Score by Changing Two Elements	★★
	2568	Minimum Impossible OR	★★
	2569	Handling Sum Queries After Update	★★★
	2570	Merge Two 2D Arrays by Summing Values	★
	2571	Minimum Operations to Reduce an Integer to 0	★★
	2572	Count the Number of Square-Free Subsets	★★
	2573	Find the String with LCP	★★★
	2574	Left and Right Sum Differences	★
	2575	Find the Divisibility Array of a String	★★
	2576	Find the Maximum Number of Marked Indices	★★
	2577	Minimum Time to Visit a Cell In a Grid	★★★
	2578	Split With Minimum Sum	★
	2579	Count Total Number of Colored Cells	★★
	2580	Count Ways to Group Overlapping Ranges	★★
	2581	Count Number of Possible Root Nodes	★★★
	2582	Pass the Pillow	★
	2583	Kth Largest Sum in a Binary Tree	★★
	2584	Split the Array to Make Coprime Products	★★★
	2585	Number of Ways to Earn Points	★★★
	2586	Count the Number of Vowel Strings in Range	★
	2587	Rearrange Array to Maximize Prefix Score	★★
	2588	Count the Number of Beautiful Subarrays	★★
	2589	Minimum Time to Complete All Tasks	★★★
	2591	Distribute Money to Maximum Children	★
	2592	Maximize Greatness of an Array	★★
	2593	Find Score of an Array After Marking All Elements	★★
	2594	Minimum Time to Repair Cars	★★
	2595	Number of Even and Odd Bits	★
	2596	Check Knight Tour Configuration	★★
	2597	The Number of Beautiful Subsets	★★
	2598	Smallest Missing Non-negative Integer After Operations	★★
	2600	K Items With the Maximum Sum	★
	2601	Prime Subtraction Operation	★★
	2602	Minimum Operations to Make All Array Elements Equal	★★
	2603	Collect Coins in a Tree	★★★
	2605	Form Smallest Number From Two Digit Arrays	★
	2606	Find the Substring With Maximum Cost	★★
	2607	Make K-Subarray Sums Equal	★★
	2608	Shortest Cycle in a Graph	★★★
	2609	Find the Longest Balanced Substring of a Binary String	★
	2610	Convert an Array Into a 2D Array With Conditions	★★
	2611	Mice and Cheese	★★
	2612	Minimum Reverse Operations	★★★
	2614	Prime In Diagonal	★
	2615	Sum of Distances	★★
	2616	Minimize the Maximum Difference of Pairs	★★
	2617	Minimum Number of Visited Cells in a Grid	★★★
	2639	Find the Width of Columns of a Grid	★
	2640	Find the Score of All Prefixes of an Array	★★
	2641	Cousins in Binary Tree II	★★
	2642	Design Graph With Shortest Path Calculator	★★★
	2643	Row With Maximum Ones	★
	2644	Find the Maximum Divisibility Score	★
	2645	Minimum Additions to Make Valid String	★★
	2646	Minimize the Total Price of the Trips	★★★
	2651	Calculate Delayed Arrival Time	★
	2652	Sum Multiples	★
	2653	Sliding Subarray Beauty	★★
	2654	Minimum Number of Operations to Make All Array Elements Equal to 1	★★
	2656	Maximum Sum With Exactly K Elements	★
	2657	Find the Prefix Common Array of Two Arrays	★★
	2658	Maximum Number of Fish in a Grid	★★
	2659	Make Array Empty	★★★
	2660	Determine the Winner of a Bowling Game	★
	2661	First Completely Painted Row or Column	★★
	2662	Minimum Cost of a Path With Special Roads	★★
	2663	Lexicographically Smallest Beautiful String	★★★
	2670	Find the Distinct Difference Array	★
	2671	Frequency Tracker	★★
	2672	Number of Adjacent Elements With the Same Color	★★
	2673	Make Costs of Paths Equal in a Binary Tree	★★
	2678	Number of Senior Citizens	★
	2679	Sum in a Matrix	★★
	2680	Maximum OR	★★
	2681	Power of Heroes	★★★
	2682	Find the Losers of the Circular Game	★
	2683	Neighboring Bitwise XOR	★★
	2684	Maximum Number of Moves in a Grid	★★
	2685	Count the Number of Complete Components	★★
	2696	Minimum String Length After Removing Substrings	★
	2697	Lexicographically Smallest Palindrome	★
	2698	Find the Punishment Number of an Integer	★★
	2699	Modify Graph Edge Weights	★★★
	2706	Buy Two Chocolates	★
	2707	Extra Characters in a String	★★
	2708	Maximum Strength of a Group	★★
	2709	Greatest Common Divisor Traversal	★★★
	2710	Remove Trailing Zeros From a String	★
	2711	Difference of Number of Distinct Values on Diagonals	★★
	2712	Minimum Cost to Make All Characters Equal	★★
	2713	Maximum Strictly Increasing Cells in a Matrix	★★★
	2716	Minimize String Length	★
	2717	Semi-Ordered Permutation	★
	2718	Sum of Matrix After Queries	★★
	2719	Count of Integers	★★★
	2729	Check if The Number is Fascinating	★
	2730	Find the Longest Semi-Repetitive Substring	★★
	2731	Movement of Robots	★★
	2732	Find a Good Subset of the Matrix	★★★
	2733	Neither Minimum nor Maximum	★
	2734	Lexicographically Smallest String After Substring Operation	★★
	2735	Collecting Chocolates	★★
	2736	Maximum Sum Queries	★★★
	2739	Total Distance Traveled	★
	2740	Find the Value of the Partition	★★
	2741	Special Permutations	★★
	2742	Painting the Walls	★★★
	2744	Find Maximum Number of String Pairs	★
	2745	Construct the Longest New String	★★
	2746	Decremental String Concatenation	★★
	2747	Count Zero Request Servers	★★
	2748	Number of Beautiful Pairs	★
	2749	Minimum Operations to Make the Integer Zero	★★
	2750	Ways to Split Array Into Good Subarrays	★★
	2751	Robot Collisions	★★★
	2760	Longest Even Odd Subarray With Threshold	★
	2761	Prime Pairs With Target Sum	★★
	2762	Continuous Subarrays	★★
	2763	Sum of Imbalance Numbers of All Subarrays	★★★
	2765	Longest Alternating Subarray	★
	2766	Relocate Marbles	★★
	2767	Partition String Into Minimum Beautiful Substrings	★★
	2768	Number of Black Blocks	★★
	2769	Find the Maximum Achievable Number	★
	2770	Maximum Number of Jumps to Reach the Last Index	★★
	2771	Longest Non-decreasing Subarray From Two Arrays	★★
	2772	Apply Operations to Make All Array Elements Equal to Zero	★★
	2778	Sum of Squares of Special Elements	★
	2779	Maximum Beauty of an Array After Applying Operation	★★
	2780	Minimum Index of a Valid Split	★★
	2781	Length of the Longest Valid Substring	★★★
	2784	Check if Array is Good	★
	2785	Sort Vowels in a String	★★
	2786	Visit Array Positions to Maximize Score	★★
	2787	Ways to Express an Integer as Sum of Powers	★★
	2788	Split Strings by Separator	★
	2789	Largest Element in an Array after Merge Operations	★★
	2790	Maximum Number of Groups With Increasing Length	★★★
	2791	Count Paths That Can Form a Palindrome in a Tree	★★★
	2798	Number of Employees Who Met the Target	★
	2799	Count Complete Subarrays in an Array	★★
	2800	Shortest String That Contains Three Strings	★★
	2801	Count Stepping Numbers in Range	★★★
	2806	Account Balance After Rounded Purchase	★
	2807	Insert Greatest Common Divisors in Linked List	★★
	2808	Minimum Seconds to Equalize a Circular Array	★★
	2809	Minimum Time to Make Array Sum At Most x	★★★
	2810	Faulty Keyboard	★
	2811	Check if it is Possible to Split Array	★★
	2812	Find the Safest Path in a Grid	★★
	2813	Maximum Elegance of a K-Length Subsequence	★★★
	2815	Max Pair Sum in an Array	★
	2816	Double a Number Represented as a Linked List	★★
	2817	Minimum Absolute Difference Between Elements With Constraint	★★
	2818	Apply Operations to Maximize Score	★★★
	2824	Count Pairs Whose Sum is Less than Target	★
	2825	Make String a Subsequence Using Cyclic Increments	★★
	2826	Sorting Three Groups	★★
	2827	Number of Beautiful Integers in the Range	★★★
	2828	Check if a String Is an Acronym of Words	★
	2829	Determine the Minimum Sum of a k-avoiding Array	★★
	2830	Maximize the Profit as the Salesman	★★
	2831	Find the Longest Equal Subarray	★★
	2833	Furthest Point From Origin	★
	2834	Find the Minimum Possible Sum of a Beautiful Array	★★
	2835	Minimum Operations to Form Subsequence With Target Sum	★★★
	2836	Maximize Value of Function in a Ball Passing Game	★★★
	2839	Check if Strings Can be Made Equal With Operations I	★
	2840	Check if Strings Can be Made Equal With Operations II	★★
	2841	Maximum Sum of Almost Unique Subarray	★★
	2842	Count K-Subsequences of a String With Maximum Beauty	★★★
	2843	Count Symmetric Integers	★
	2844	Minimum Operations to Make a Special Number	★★
	2845	Count of Interesting Subarrays	★★
	2846	Minimum Edge Weight Equilibrium Queries in a Tree	★★★
	2848	Points That Intersect With Cars	★
	2849	Determine if a Cell Is Reachable at a Given Time	★★
	2850	Minimum Moves to Spread Stones Over Grid	★★
	2851	String Transformation	★★★
	2855	Minimum Right Shifts to Sort the Array	★
	2856	Minimum Array Length After Pair Removals	★★
	2857	Count Pairs of Points With Distance k	★★
	2858	Minimum Edge Reversals So Every Node Is Reachable	★★★
	2859	Sum of Values at Indices With K Set Bits	★
	2860	Happy Students	★★
	2861	Maximum Number of Alloys	★★
	2862	Maximum Element-Sum of a Complete Subset of Indices	★★★
	2864	Maximum Odd Binary Number	★
	2865	Beautiful Towers I	★★
	2866	Beautiful Towers II	★★
	2867	Count Valid Paths in a Tree	★★★