LeetCode Progress Report

Source code

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Progress Chart

Detail

DoneIDTitleDifficultySolutions
1Two Sum
2Add Two Numbers★★
3Longest Substring Without Repeating Characters★★
4Median of Two Sorted Arrays★★★
5Longest Palindromic Substring★★
6ZigZag Conversion★★
7Reverse Integer
8String to Integer (atoi)★★
9Palindrome Number
10Regular Expression Matching★★★
11Container With Most Water★★
12Integer to Roman★★
13Roman to Integer
14Longest Common Prefix
153Sum★★
163Sum Closest★★
17Letter Combinations of a Phone Number★★
184Sum★★
19Remove Nth Node From End of List★★
20Valid Parentheses
21Merge Two Sorted Lists
22Generate Parentheses★★
23Merge k Sorted Lists★★★
24Swap Nodes in Pairs★★
25Reverse Nodes in k-Group★★★
26Remove Duplicates from Sorted Array
27Remove Element
28Implement strStr()
29Divide Two Integers★★
30Substring with Concatenation of All Words★★★
31Next Permutation★★
32Longest Valid Parentheses★★★
33Search in Rotated Sorted Array★★
34Find First and Last Position of Element in Sorted Array★★
35Search Insert Position
36Valid Sudoku★★
37Sudoku Solver★★★
38Count and Say
39Combination Sum★★
40Combination Sum II★★
41First Missing Positive★★★
42Trapping Rain Water★★★
43Multiply Strings★★
44Wildcard Matching★★★
45Jump Game II★★★
46Permutations★★
47Permutations II★★
48Rotate Image★★
49Group Anagrams★★
50Pow(x, n)★★
51N-Queens★★★
52N-Queens II★★★
53Maximum Subarray
54Spiral Matrix★★
55Jump Game★★
56Merge Intervals★★
57Insert Interval★★
58Length of Last Word
59Spiral Matrix II★★
60Permutation Sequence★★★
61Rotate List★★
62Unique Paths★★
63Unique Paths II★★
64Minimum Path Sum★★
65Valid Number★★★
66Plus One
67Add Binary
68Text Justification★★★
69Sqrt(x)
70Climbing Stairs
71Simplify Path★★
72Edit Distance★★★
73Set Matrix Zeroes★★
74Search a 2D Matrix★★
75Sort Colors★★
76Minimum Window Substring★★★
77Combinations★★
78Subsets★★
79Word Search★★
80Remove Duplicates from Sorted Array II★★
81Search in Rotated Sorted Array II★★
82Remove Duplicates from Sorted List II★★
83Remove Duplicates from Sorted List
84Largest Rectangle in Histogram★★★
85Maximal Rectangle★★★
86Partition List★★
87Scramble String★★★
88Merge Sorted Array
89Gray Code★★
90Subsets II★★
91Decode Ways★★
92Reverse Linked List II★★
93Restore IP Addresses★★
94Binary Tree Inorder Traversal★★
95Unique Binary Search Trees II★★
96Unique Binary Search Trees★★
97Interleaving String★★★
98Validate Binary Search Tree★★
99Recover Binary Search Tree★★★
100Same Tree
101Symmetric Tree
102Binary Tree Level Order Traversal★★
103Binary Tree Zigzag Level Order Traversal★★
104Maximum Depth of Binary Tree
105Construct Binary Tree from Preorder and Inorder Traversal★★
106Construct Binary Tree from Inorder and Postorder Traversal★★
107Binary Tree Level Order Traversal II
108Convert Sorted Array to Binary Search Tree
109Convert Sorted List to Binary Search Tree★★
110Balanced Binary Tree
111Minimum Depth of Binary Tree
112Path Sum
113Path Sum II★★
114Flatten Binary Tree to Linked List★★
115Distinct Subsequences★★★
116Populating Next Right Pointers in Each Node★★
117Populating Next Right Pointers in Each Node II★★
118Pascal's Triangle
119Pascal's Triangle II
120Triangle★★
121Best Time to Buy and Sell Stock
122Best Time to Buy and Sell Stock II
123Best Time to Buy and Sell Stock III★★★
124Binary Tree Maximum Path Sum★★★
125Valid Palindrome
126Word Ladder II★★★
127Word Ladder★★★
128Longest Consecutive Sequence★★★
129Sum Root to Leaf Numbers★★
130Surrounded Regions★★
131Palindrome Partitioning★★
132Palindrome Partitioning II★★★
133Clone Graph★★
134Gas Station★★
135Candy★★★
136Single Number
137Single Number II★★
138Copy List with Random Pointer★★
139Word Break★★
140Word Break II★★★
141Linked List Cycle
142Linked List Cycle II★★
143Reorder List★★
144Binary Tree Preorder Traversal★★
145Binary Tree Postorder Traversal★★
146LRU Cache★★
147Insertion Sort List★★
148Sort List★★
149Max Points on a Line★★★
150Evaluate Reverse Polish Notation★★
151Reverse Words in a String★★
152Maximum Product Subarray★★
153Find Minimum in Rotated Sorted Array★★
154Find Minimum in Rotated Sorted Array II★★★
155Min Stack
160Intersection of Two Linked Lists
162Find Peak Element★★
164Maximum Gap★★★
165Compare Version Numbers★★
166Fraction to Recurring Decimal★★
167Two Sum II - Input array is sorted
168Excel Sheet Column Title
169Majority Element
171Excel Sheet Column Number
172Factorial Trailing Zeroes
173Binary Search Tree Iterator★★
174Dungeon Game★★★
179Largest Number★★
187Repeated DNA Sequences★★
188Best Time to Buy and Sell Stock IV★★★
189Rotate Array★★
190Reverse Bits
191Number of 1 Bits
198House Robber★★
199Binary Tree Right Side View★★
200Number of Islands★★
201Bitwise AND of Numbers Range★★
202Happy Number
203Remove Linked List Elements
204Count Primes
205Isomorphic Strings
206Reverse Linked List
207Course Schedule★★
208Implement Trie (Prefix Tree)★★
209Minimum Size Subarray Sum★★
210Course Schedule II★★
211Design Add and Search Words Data Structure★★
212Word Search II★★★
213House Robber II★★
214Shortest Palindrome★★★
215Kth Largest Element in an Array★★
216Combination Sum III★★
217Contains Duplicate
218The Skyline Problem★★★
219Contains Duplicate II
220Contains Duplicate III★★
221Maximal Square★★
222Count Complete Tree Nodes★★
223Rectangle Area★★
224Basic Calculator★★★
225Implement Stack using Queues
226Invert Binary Tree
227Basic Calculator II★★
228Summary Ranges
229Majority Element II★★
230Kth Smallest Element in a BST★★
231Power of Two
232Implement Queue using Stacks
233Number of Digit One★★★
234Palindrome Linked List
235Lowest Common Ancestor of a Binary Search Tree
236Lowest Common Ancestor of a Binary Tree★★
237Delete Node in a Linked List
238Product of Array Except Self★★
239Sliding Window Maximum★★★
240Search a 2D Matrix II★★
241Different Ways to Add Parentheses★★
242Valid Anagram
257Binary Tree Paths
258Add Digits
260Single Number III★★
263Ugly Number
264Ugly Number II★★
268Missing Number
273Integer to English Words★★★
274H-Index★★
275H-Index II★★
278First Bad Version
279Perfect Squares★★
282Expression Add Operators★★★
283Move Zeroes
284Peeking Iterator★★
287Find the Duplicate Number★★
289Game of Life★★
290Word Pattern
292Nim Game
295Find Median from Data Stream★★★
297Serialize and Deserialize Binary Tree★★★
299Bulls and Cows★★
300Longest Increasing Subsequence★★
301Remove Invalid Parentheses★★★
303Range Sum Query - Immutable
304Range Sum Query 2D - Immutable★★
306Additive Number★★
307Range Sum Query - Mutable★★
309Best Time to Buy and Sell Stock with Cooldown★★
310Minimum Height Trees★★
312Burst Balloons★★★
313Super Ugly Number★★
315Count of Smaller Numbers After Self★★★
316Remove Duplicate Letters★★
318Maximum Product of Word Lengths★★
319Bulb Switcher★★
321Create Maximum Number★★★
322Coin Change★★
324Wiggle Sort II★★
326Power of Three
327Count of Range Sum★★★
328Odd Even Linked List★★
329Longest Increasing Path in a Matrix★★★
330Patching Array★★★
331Verify Preorder Serialization of a Binary Tree★★
332Reconstruct Itinerary★★
334Increasing Triplet Subsequence★★
335Self Crossing★★★
336Palindrome Pairs★★★
337House Robber III★★
338Counting Bits★★
341Flatten Nested List Iterator★★
342Power of Four
343Integer Break★★
344Reverse String
345Reverse Vowels of a String
347Top K Frequent Elements★★
349Intersection of Two Arrays
350Intersection of Two Arrays II
352Data Stream as Disjoint Intervals★★★
354Russian Doll Envelopes★★★
355Design Twitter★★
357Count Numbers with Unique Digits★★
363Max Sum of Rectangle No Larger Than K★★★
365Water and Jug Problem★★
367Valid Perfect Square
368Largest Divisible Subset★★
371Sum of Two Integers★★
372Super Pow★★
373Find K Pairs with Smallest Sums★★
374Guess Number Higher or Lower
375Guess Number Higher or Lower II★★
376Wiggle Subsequence★★
377Combination Sum IV★★
378Kth Smallest Element in a Sorted Matrix★★
380Insert Delete GetRandom O(1)★★
381Insert Delete GetRandom O(1) - Duplicates allowed★★★
382Linked List Random Node★★
383Ransom Note
384Shuffle an Array★★
385Mini Parser★★
386Lexicographical Numbers★★
387First Unique Character in a String
388Longest Absolute File Path★★
389Find the Difference
390Elimination Game★★
391Perfect Rectangle★★★
392Is Subsequence
393UTF-8 Validation★★
394Decode String★★
395Longest Substring with At Least K Repeating Characters★★
396Rotate Function★★
397Integer Replacement★★
398Random Pick Index★★
399Evaluate Division★★
400Nth Digit★★
401Binary Watch
402Remove K Digits★★
403Frog Jump★★★
404Sum of Left Leaves
405Convert a Number to Hexadecimal
406Queue Reconstruction by Height★★
407Trapping Rain Water II★★★
409Longest Palindrome
410Split Array Largest Sum★★★
412Fizz Buzz
413Arithmetic Slices★★
414Third Maximum Number
415Add Strings
416Partition Equal Subset Sum★★
417Pacific Atlantic Water Flow★★
419Battleships in a Board★★
420Strong Password Checker★★★
421Maximum XOR of Two Numbers in an Array★★
423Reconstruct Original Digits from English★★
424Longest Repeating Character Replacement★★
427Construct Quad Tree★★
429N-ary Tree Level Order Traversal★★
430Flatten a Multilevel Doubly Linked List★★
432All O`one Data Structure★★★
433Minimum Genetic Mutation★★
434Number of Segments in a String
435Non-overlapping Intervals★★
436Find Right Interval★★
437Path Sum III★★
438Find All Anagrams in a String★★
440K-th Smallest in Lexicographical Order★★★
441Arranging Coins
442Find All Duplicates in an Array★★
443String Compression★★
445Add Two Numbers II★★
446Arithmetic Slices II - Subsequence★★★
447Number of Boomerangs★★
448Find All Numbers Disappeared in an Array
449Serialize and Deserialize BST★★
450Delete Node in a BST★★
451Sort Characters By Frequency★★
452Minimum Number of Arrows to Burst Balloons★★
453Minimum Moves to Equal Array Elements
4544Sum II★★
455Assign Cookies
456132 Pattern★★
457Circular Array Loop★★
458Poor Pigs★★★
459Repeated Substring Pattern
460LFU Cache★★★
461Hamming Distance
462Minimum Moves to Equal Array Elements II★★
463Island Perimeter
464Can I Win★★
466Count The Repetitions★★★
467Unique Substrings in Wraparound String★★
468Validate IP Address★★
470Implement Rand10() Using Rand7()★★
472Concatenated Words★★★
473Matchsticks to Square★★
474Ones and Zeroes★★
475Heaters★★
476Number Complement
477Total Hamming Distance★★
478Generate Random Point in a Circle★★
479Largest Palindrome Product★★★
480Sliding Window Median★★★
481Magical String★★
482License Key Formatting
483Smallest Good Base★★★
485Max Consecutive Ones
486Predict the Winner★★
488Zuma Game★★★
491Increasing Subsequences★★
492Construct the Rectangle
493Reverse Pairs★★★
494Target Sum★★
495Teemo Attacking★★
496Next Greater Element I
497Random Point in Non-overlapping Rectangles★★
498Diagonal Traverse★★
500Keyboard Row
501Find Mode in Binary Search Tree
502IPO★★★
503Next Greater Element II★★
504Base 7
506Relative Ranks
507Perfect Number
508Most Frequent Subtree Sum★★
509Fibonacci Number
513Find Bottom Left Tree Value★★
514Freedom Trail★★★
515Find Largest Value in Each Tree Row★★
516Longest Palindromic Subsequence★★
517Super Washing Machines★★★
518Coin Change 2★★
519Random Flip Matrix★★
520Detect Capital
521Longest Uncommon Subsequence I
522Longest Uncommon Subsequence II★★
523Continuous Subarray Sum★★
524Longest Word in Dictionary through Deleting★★
525Contiguous Array★★
526Beautiful Arrangement★★
528Random Pick with Weight★★
529Minesweeper★★
530Minimum Absolute Difference in BST
532K-diff Pairs in an Array★★
535Encode and Decode TinyURL★★
537Complex Number Multiplication★★
538Convert BST to Greater Tree★★
539Minimum Time Difference★★
540Single Element in a Sorted Array★★
541Reverse String II
54201 Matrix★★
543Diameter of Binary Tree
546Remove Boxes★★★
547Number of Provinces★★
551Student Attendance Record I
552Student Attendance Record II★★★
553Optimal Division★★
554Brick Wall★★
556Next Greater Element III★★
557Reverse Words in a String III
558Logical OR of Two Binary Grids Represented as Quad-Trees★★
559Maximum Depth of N-ary Tree
560Subarray Sum Equals K★★
561Array Partition I
563Binary Tree Tilt
564Find the Closest Palindrome★★★
565Array Nesting★★
566Reshape the Matrix
567Permutation in String★★
572Subtree of Another Tree
575Distribute Candies
576Out of Boundary Paths★★
581Shortest Unsorted Continuous Subarray★★
583Delete Operation for Two Strings★★
587Erect the Fence★★★
589N-ary Tree Preorder Traversal
590N-ary Tree Postorder Traversal
591Tag Validator★★★
592Fraction Addition and Subtraction★★
593Valid Square★★
594Longest Harmonious Subsequence
598Range Addition II
599Minimum Index Sum of Two Lists
600Non-negative Integers without Consecutive Ones★★★
605Can Place Flowers
606Construct String from Binary Tree
609Find Duplicate File in System★★
611Valid Triangle Number★★
617Merge Two Binary Trees
621Task Scheduler★★
622Design Circular Queue★★
623Add One Row to Tree★★
628Maximum Product of Three Numbers
629K Inverse Pairs Array★★★
630Course Schedule III★★★
632Smallest Range Covering Elements from K Lists★★★
633Sum of Square Numbers★★
636Exclusive Time of Functions★★
637Average of Levels in Binary Tree
638Shopping Offers★★
639Decode Ways II★★★
640Solve the Equation★★
641Design Circular Deque★★
643Maximum Average Subarray I
645Set Mismatch
646Maximum Length of Pair Chain★★
647Palindromic Substrings★★
648Replace Words★★
649Dota2 Senate★★
6502 Keys Keyboard★★
652Find Duplicate Subtrees★★
653Two Sum IV - Input is a BST
654Maximum Binary Tree★★
655Print Binary Tree★★
657Robot Return to Origin
658Find K Closest Elements★★
659Split Array into Consecutive Subsequences★★
661Image Smoother
662Maximum Width of Binary Tree★★
664Strange Printer★★★
665Non-decreasing Array
667Beautiful Arrangement II★★
668Kth Smallest Number in Multiplication Table★★★
669Trim a Binary Search Tree
670Maximum Swap★★
671Second Minimum Node In a Binary Tree
672Bulb Switcher II★★
673Number of Longest Increasing Subsequence★★
674Longest Continuous Increasing Subsequence
675Cut Off Trees for Golf Event★★★
676Implement Magic Dictionary★★
677Map Sum Pairs★★
678Valid Parenthesis String★★
67924 Game★★★
680Valid Palindrome II
682Baseball Game
684Redundant Connection★★
685Redundant Connection II★★★
686Repeated String Match★★
687Longest Univalue Path★★
688Knight Probability in Chessboard★★
689Maximum Sum of 3 Non-Overlapping Subarrays★★★
690Employee Importance
691Stickers to Spell Word★★★
692Top K Frequent Words★★
693Binary Number with Alternating Bits
695Max Area of Island★★
696Count Binary Substrings
697Degree of an Array
698Partition to K Equal Sum Subsets★★
699Falling Squares★★★
700Search in a Binary Search Tree
701Insert into a Binary Search Tree★★
703Kth Largest Element in a Stream
704Binary Search
705Design HashSet
706Design HashMap
707Design Linked List★★
709To Lower Case
710Random Pick with Blacklist★★★
712Minimum ASCII Delete Sum for Two Strings★★
713Subarray Product Less Than K★★
714Best Time to Buy and Sell Stock with Transaction Fee★★
715Range Module★★★
7171-bit and 2-bit Characters
718Maximum Length of Repeated Subarray★★
719Find K-th Smallest Pair Distance★★★
720Longest Word in Dictionary
721Accounts Merge★★
722Remove Comments★★
724Find Pivot Index
725Split Linked List in Parts★★
726Number of Atoms★★★
728Self Dividing Numbers
729My Calendar I★★
730Count Different Palindromic Subsequences★★★
731My Calendar II★★
732My Calendar III★★★
733Flood Fill
735Asteroid Collision★★
736Parse Lisp Expression★★★
738Monotone Increasing Digits★★
739Daily Temperatures★★
740Delete and Earn★★
741Cherry Pickup★★★
743Network Delay Time★★
744Find Smallest Letter Greater Than Target
745Prefix and Suffix Search★★★
746Min Cost Climbing Stairs
747Largest Number At Least Twice of Others
748Shortest Completing Word
749Contain Virus★★★
752Open the Lock★★
753Cracking the Safe★★★
754Reach a Number★★
756Pyramid Transition Matrix★★
757Set Intersection Size At Least Two★★★
761Special Binary String★★★
762Prime Number of Set Bits in Binary Representation
763Partition Labels★★
764Largest Plus Sign★★
765Couples Holding Hands★★★
766Toeplitz Matrix
767Reorganize String★★
768Max Chunks To Make Sorted II★★★
769Max Chunks To Make Sorted★★
770Basic Calculator IV★★★
771Jewels and Stones
773Sliding Puzzle★★★
775Global and Local Inversions★★
777Swap Adjacent in LR String★★
778Swim in Rising Water★★★
779K-th Symbol in Grammar★★
780Reaching Points★★★
781Rabbits in Forest★★
782Transform to Chessboard★★★
783Minimum Distance Between BST Nodes
784Letter Case Permutation★★
785Is Graph Bipartite?★★
786K-th Smallest Prime Fraction★★★
787Cheapest Flights Within K Stops★★
788Rotated Digits
789Escape The Ghosts★★
790Domino and Tromino Tiling★★
791Custom Sort String★★
792Number of Matching Subsequences★★
793Preimage Size of Factorial Zeroes Function★★★
794Valid Tic-Tac-Toe State★★
795Number of Subarrays with Bounded Maximum★★
796Rotate String
797All Paths From Source to Target★★
798Smallest Rotation with Highest Score★★★
799Champagne Tower★★
801Minimum Swaps To Make Sequences Increasing★★
802Find Eventual Safe States★★
803Bricks Falling When Hit★★★
804Unique Morse Code Words
805Split Array With Same Average★★★
806Number of Lines To Write String
807Max Increase to Keep City Skyline★★
808Soup Servings★★
809Expressive Words★★
810Chalkboard XOR Game★★★
811Subdomain Visit Count
812Largest Triangle Area
813Largest Sum of Averages★★
814Binary Tree Pruning★★
815Bus Routes★★★
816Ambiguous Coordinates★★
817Linked List Components★★
818Race Car★★★
819Most Common Word
820Short Encoding of Words★★
821Shortest Distance to a Character
822Card Flipping Game★★
823Binary Trees With Factors★★
824Goat Latin
825Friends Of Appropriate Ages★★
826Most Profit Assigning Work★★
827Making A Large Island★★★
828Count Unique Characters of All Substrings of a Given String★★★
829Consecutive Numbers Sum★★★
830Positions of Large Groups
831Masking Personal Information★★
832Flipping an Image
833Find And Replace in String★★
834Sum of Distances in Tree★★★
835Image Overlap★★
836Rectangle Overlap
837New 21 Game★★
838Push Dominoes★★
839Similar String Groups★★★
840Magic Squares In Grid★★
841Keys and Rooms★★
842Split Array into Fibonacci Sequence★★
843Guess the Word★★★
844Backspace String Compare
845Longest Mountain in Array★★
846Hand of Straights★★
847Shortest Path Visiting All Nodes★★★
848Shifting Letters★★
849Maximize Distance to Closest Person★★
850Rectangle Area II★★★
851Loud and Rich★★
852Peak Index in a Mountain Array
853Car Fleet★★
854K-Similar Strings★★★
855Exam Room★★
856Score of Parentheses★★
857Minimum Cost to Hire K Workers★★★
858Mirror Reflection★★
859Buddy Strings
860Lemonade Change
861Score After Flipping Matrix★★
862Shortest Subarray with Sum at Least K★★★
863All Nodes Distance K in Binary Tree★★
864Shortest Path to Get All Keys★★★
865Smallest Subtree with all the Deepest Nodes★★
866Prime Palindrome★★
867Transpose Matrix
868Binary Gap
869Reordered Power of 2★★
870Advantage Shuffle★★
871Minimum Number of Refueling Stops★★★
872Leaf-Similar Trees
873Length of Longest Fibonacci Subsequence★★
874Walking Robot Simulation
875Koko Eating Bananas★★
876Middle of the Linked List
877Stone Game★★
878Nth Magical Number★★★
879Profitable Schemes★★★
880Decoded String at Index★★
881Boats to Save People★★
882Reachable Nodes In Subdivided Graph★★★
883Projection Area of 3D Shapes
884Uncommon Words from Two Sentences
885Spiral Matrix III★★
886Possible Bipartition★★
887Super Egg Drop★★★
888Fair Candy Swap
889Construct Binary Tree from Preorder and Postorder Traversal★★
890Find and Replace Pattern★★
891Sum of Subsequence Widths★★★
892Surface Area of 3D Shapes
893Groups of Special-Equivalent Strings
894All Possible Full Binary Trees★★
895Maximum Frequency Stack★★★
896Monotonic Array
897Increasing Order Search Tree
898Bitwise ORs of Subarrays★★
899Orderly Queue★★★
900RLE Iterator★★
901Online Stock Span★★
902Numbers At Most N Given Digit Set★★★
903Valid Permutations for DI Sequence★★★
904Fruit Into Baskets★★
905Sort Array By Parity
906Super Palindromes★★★
907Sum of Subarray Minimums★★
908Smallest Range I
909Snakes and Ladders★★
910Smallest Range II★★
911Online Election★★
912Sort an Array★★
913Cat and Mouse★★★
914X of a Kind in a Deck of Cards
915Partition Array into Disjoint Intervals★★
916Word Subsets★★
917Reverse Only Letters
918Maximum Sum Circular Subarray★★
919Complete Binary Tree Inserter★★
920Number of Music Playlists★★★
921Minimum Add to Make Parentheses Valid★★
922Sort Array By Parity II
9233Sum With Multiplicity★★
924Minimize Malware Spread★★★
925Long Pressed Name
926Flip String to Monotone Increasing★★
927Three Equal Parts★★★
928Minimize Malware Spread II★★★
929Unique Email Addresses
930Binary Subarrays With Sum★★
931Minimum Falling Path Sum★★
932Beautiful Array★★
933Number of Recent Calls
934Shortest Bridge★★
935Knight Dialer★★
936Stamping The Sequence★★★
937Reorder Data in Log Files
938Range Sum of BST
939Minimum Area Rectangle★★
940Distinct Subsequences II★★★
941Valid Mountain Array
942DI String Match
943Find the Shortest Superstring★★★
944Delete Columns to Make Sorted
945Minimum Increment to Make Array Unique★★
946Validate Stack Sequences★★
947Most Stones Removed with Same Row or Column★★
948Bag of Tokens★★
949Largest Time for Given Digits★★
950Reveal Cards In Increasing Order★★
951Flip Equivalent Binary Trees★★
952Largest Component Size by Common Factor★★★
953Verifying an Alien Dictionary
954Array of Doubled Pairs★★
955Delete Columns to Make Sorted II★★
956Tallest Billboard★★★
957Prison Cells After N Days★★
958Check Completeness of a Binary Tree★★
959Regions Cut By Slashes★★
960Delete Columns to Make Sorted III★★★
961N-Repeated Element in Size 2N Array
962Maximum Width Ramp★★
963Minimum Area Rectangle II★★
964Least Operators to Express Number★★★
965Univalued Binary Tree
966Vowel Spellchecker★★
967Numbers With Same Consecutive Differences★★
968Binary Tree Cameras★★★
969Pancake Sorting★★
970Powerful Integers
971Flip Binary Tree To Match Preorder Traversal★★
972Equal Rational Numbers★★★
973K Closest Points to Origin★★
974Subarray Sums Divisible by K★★
975Odd Even Jump★★★
976Largest Perimeter Triangle
977Squares of a Sorted Array
978Longest Turbulent Subarray★★
979Distribute Coins in Binary Tree★★
980Unique Paths III★★★
981Time Based Key-Value Store★★
982Triples with Bitwise AND Equal To Zero★★★
983Minimum Cost For Tickets★★
984String Without AAA or BBB★★
985Sum of Even Numbers After Queries
986Interval List Intersections★★
987Vertical Order Traversal of a Binary Tree★★
988Smallest String Starting From Leaf★★
989Add to Array-Form of Integer
990Satisfiability of Equality Equations★★
991Broken Calculator★★
992Subarrays with K Different Integers★★★
993Cousins in Binary Tree
994Rotting Oranges★★
995Minimum Number of K Consecutive Bit Flips★★★
996Number of Squareful Arrays★★★
997Find the Town Judge
998Maximum Binary Tree II★★
999Available Captures for Rook
1000Minimum Cost to Merge Stones★★★
1001Grid Illumination★★★
1002Find Common Characters
1003Check If Word Is Valid After Substitutions★★
1004Max Consecutive Ones III★★
1005Maximize Sum Of Array After K Negations
1006Clumsy Factorial★★
1007Minimum Domino Rotations For Equal Row★★
1008Construct Binary Search Tree from Preorder Traversal★★
1009Complement of Base 10 Integer
1010Pairs of Songs With Total Durations Divisible by 60★★
1011Capacity To Ship Packages Within D Days★★
1012Numbers With Repeated Digits★★★
1013Partition Array Into Three Parts With Equal Sum
1014Best Sightseeing Pair★★
1015Smallest Integer Divisible by K★★
1016Binary String With Substrings Representing 1 To N★★
1017Convert to Base -2★★
1018Binary Prefix Divisible By 5
1019Next Greater Node In Linked List★★
1020Number of Enclaves★★
1021Remove Outermost Parentheses
1022Sum of Root To Leaf Binary Numbers
1023Camelcase Matching★★
1024Video Stitching★★
1025Divisor Game
1026Maximum Difference Between Node and Ancestor★★
1027Longest Arithmetic Subsequence★★
1028Recover a Tree From Preorder Traversal★★★
1029Two City Scheduling★★
1030Matrix Cells in Distance Order
1031Maximum Sum of Two Non-Overlapping Subarrays★★
1032Stream of Characters★★★
1033Moving Stones Until Consecutive
1034Coloring A Border★★
1035Uncrossed Lines★★
1036Escape a Large Maze★★★
1037Valid Boomerang
1038Binary Search Tree to Greater Sum Tree★★
1039Minimum Score Triangulation of Polygon★★
1040Moving Stones Until Consecutive II★★
1041Robot Bounded In Circle★★
1042Flower Planting With No Adjacent★★
1043Partition Array for Maximum Sum★★
1044Longest Duplicate Substring★★★
1046Last Stone Weight
1047Remove All Adjacent Duplicates In String
1048Longest String Chain★★
1049Last Stone Weight II★★
1051Height Checker
1052Grumpy Bookstore Owner★★
1053Previous Permutation With One Swap★★
1054Distant Barcodes★★
1071Greatest Common Divisor of Strings
1072Flip Columns For Maximum Number of Equal Rows★★
1073Adding Two Negabinary Numbers★★
1074Number of Submatrices That Sum to Target★★★
1078Occurrences After Bigram
1079Letter Tile Possibilities★★
1080Insufficient Nodes in Root to Leaf Paths★★
1081Smallest Subsequence of Distinct Characters★★
1089Duplicate Zeros
1090Largest Values From Labels★★
1091Shortest Path in Binary Matrix★★
1092Shortest Common Supersequence ★★★
1093Statistics from a Large Sample★★
1094Car Pooling★★
1095Find in Mountain Array★★★
1096Brace Expansion II★★★
1103Distribute Candies to People
1104Path In Zigzag Labelled Binary Tree★★
1105Filling Bookcase Shelves★★
1106Parsing A Boolean Expression★★★
1108Defanging an IP Address
1109Corporate Flight Bookings★★
1110Delete Nodes And Return Forest★★
1111Maximum Nesting Depth of Two Valid Parentheses Strings★★
1122Relative Sort Array
1123Lowest Common Ancestor of Deepest Leaves★★
1124Longest Well-Performing Interval★★
1125Smallest Sufficient Team★★★
1128Number of Equivalent Domino Pairs
1129Shortest Path with Alternating Colors★★
1130Minimum Cost Tree From Leaf Values★★
1131Maximum of Absolute Value Expression★★
1137N-th Tribonacci Number
1138Alphabet Board Path★★
1139Largest 1-Bordered Square★★
1140Stone Game II★★
1143Longest Common Subsequence★★
1144Decrease Elements To Make Array Zigzag★★
1145Binary Tree Coloring Game★★
1146Snapshot Array★★
1147Longest Chunked Palindrome Decomposition★★★
1154Day of the Year
1155Number of Dice Rolls With Target Sum★★
1156Swap For Longest Repeated Character Substring★★
1157Online Majority Element In Subarray★★★
1160Find Words That Can Be Formed by Characters
1161Maximum Level Sum of a Binary Tree★★
1162As Far from Land as Possible★★
1163Last Substring in Lexicographical Order★★★
1169Invalid Transactions★★
1170Compare Strings by Frequency of the Smallest Character★★
1171Remove Zero Sum Consecutive Nodes from Linked List★★
1172Dinner Plate Stacks★★★
1175Prime Arrangements
1177Can Make Palindrome from Substring★★
1178Number of Valid Words for Each Puzzle★★★
1184Distance Between Bus Stops
1185Day of the Week
1186Maximum Subarray Sum with One Deletion★★
1187Make Array Strictly Increasing★★★
1189Maximum Number of Balloons
1190Reverse Substrings Between Each Pair of Parentheses★★
1191K-Concatenation Maximum Sum★★
1192Critical Connections in a Network★★★
1200Minimum Absolute Difference
1201Ugly Number III★★
1202Smallest String With Swaps★★
1203Sort Items by Groups Respecting Dependencies★★★
1206Design Skiplist★★★
1207Unique Number of Occurrences
1208Get Equal Substrings Within Budget★★
1209Remove All Adjacent Duplicates in String II★★
1210Minimum Moves to Reach Target with Rotations★★★
1217Minimum Cost to Move Chips to The Same Position
1218Longest Arithmetic Subsequence of Given Difference★★
1219Path with Maximum Gold★★
1220Count Vowels Permutation★★★
1221Split a String in Balanced Strings
1222Queens That Can Attack the King★★
1223Dice Roll Simulation★★★
1224Maximum Equal Frequency★★★
1227Airplane Seat Assignment Probability★★
1232Check If It Is a Straight Line
1233Remove Sub-Folders from the Filesystem★★
1234Replace the Substring for Balanced String★★
1235Maximum Profit in Job Scheduling★★★
1237Find Positive Integer Solution for a Given Equation★★
1238Circular Permutation in Binary Representation★★
1239Maximum Length of a Concatenated String with Unique Characters★★
1240Tiling a Rectangle with the Fewest Squares★★★
1247Minimum Swaps to Make Strings Equal★★
1248Count Number of Nice Subarrays★★
1249Minimum Remove to Make Valid Parentheses★★
1250Check If It Is a Good Array★★★
1252Cells with Odd Values in a Matrix
1253Reconstruct a 2-Row Binary Matrix★★
1254Number of Closed Islands★★
1255Maximum Score Words Formed by Letters★★★
1260Shift 2D Grid
1261Find Elements in a Contaminated Binary Tree★★
1262Greatest Sum Divisible by Three★★
1263Minimum Moves to Move a Box to Their Target Location★★★
1266Minimum Time Visiting All Points
1267Count Servers that Communicate★★
1268Search Suggestions System★★
1269Number of Ways to Stay in the Same Place After Some Steps★★★
1275Find Winner on a Tic Tac Toe Game
1276Number of Burgers with No Waste of Ingredients★★
1277Count Square Submatrices with All Ones★★
1278Palindrome Partitioning III★★★
1281Subtract the Product and Sum of Digits of an Integer
1282Group the People Given the Group Size They Belong To★★
1283Find the Smallest Divisor Given a Threshold★★
1284Minimum Number of Flips to Convert Binary Matrix to Zero Matrix★★★
1286Iterator for Combination★★
1287Element Appearing More Than 25% In Sorted Array
1288Remove Covered Intervals★★
1289Minimum Falling Path Sum II★★★
1290Convert Binary Number in a Linked List to Integer
1291Sequential Digits★★
1292Maximum Side Length of a Square with Sum Less than or Equal to Threshold★★
1293Shortest Path in a Grid with Obstacles Elimination★★★
1295Find Numbers with Even Number of Digits
1296Divide Array in Sets of K Consecutive Numbers★★
1297Maximum Number of Occurrences of a Substring★★
1298Maximum Candies You Can Get from Boxes★★★
1299Replace Elements with Greatest Element on Right Side
1300Sum of Mutated Array Closest to Target★★
1301Number of Paths with Max Score★★★
1302Deepest Leaves Sum★★
1304Find N Unique Integers Sum up to Zero
1305All Elements in Two Binary Search Trees★★
1306Jump Game III★★
1307Verbal Arithmetic Puzzle★★★
1309Decrypt String from Alphabet to Integer Mapping
1310XOR Queries of a Subarray★★
1311Get Watched Videos by Your Friends★★
1312Minimum Insertion Steps to Make a String Palindrome★★★
1313Decompress Run-Length Encoded List
1314Matrix Block Sum★★
1315Sum of Nodes with Even-Valued Grandparent★★
1316Distinct Echo Substrings★★★
1317Convert Integer to the Sum of Two No-Zero Integers
1318Minimum Flips to Make a OR b Equal to c★★
1319Number of Operations to Make Network Connected★★
1320Minimum Distance to Type a Word Using Two Fingers★★★
1323Maximum 69 Number
1324Print Words Vertically★★
1325Delete Leaves With a Given Value★★
1326Minimum Number of Taps to Open to Water a Garden★★★
1328Break a Palindrome★★
1329Sort the Matrix Diagonally★★
1330Reverse Subarray To Maximize Array Value★★★
1331Rank Transform of an Array
1332Remove Palindromic Subsequences
1333Filter Restaurants by Vegan-Friendly, Price and Distance★★
1334Find the City With the Smallest Number of Neighbors at a Threshold Distance★★
1335Minimum Difficulty of a Job Schedule★★★
1337The K Weakest Rows in a Matrix
1338Reduce Array Size to The Half★★
1339Maximum Product of Splitted Binary Tree★★
1340Jump Game V★★★
1342Number of Steps to Reduce a Number to Zero
1343Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold★★
1344Angle Between Hands of a Clock★★
1345Jump Game IV★★★
1346Check If N and Its Double Exist
1347Minimum Number of Steps to Make Two Strings Anagram★★
1348Tweet Counts Per Frequency★★
1349Maximum Students Taking Exam★★★
1351Count Negative Numbers in a Sorted Matrix
1352Product of the Last K Numbers★★
1353Maximum Number of Events That Can Be Attended★★
1354Construct Target Array With Multiple Sums★★★
1356Sort Integers by The Number of 1 Bits
1357Apply Discount Every n Orders★★
1358Number of Substrings Containing All Three Characters★★
1359Count All Valid Pickup and Delivery Options★★★
1360Number of Days Between Two Dates
1361Validate Binary Tree Nodes★★
1362Closest Divisors★★
1363Largest Multiple of Three★★★
1365How Many Numbers Are Smaller Than the Current Number
1366Rank Teams by Votes★★
1367Linked List in Binary Tree★★
1368Minimum Cost to Make at Least One Valid Path in a Grid★★★
1370Increasing Decreasing String
1371Find the Longest Substring Containing Vowels in Even Counts★★
1372Longest ZigZag Path in a Binary Tree★★
1373Maximum Sum BST in Binary Tree★★★
1374Generate a String With Characters That Have Odd Counts
1375Bulb Switcher III★★
1376Time Needed to Inform All Employees★★
1377Frog Position After T Seconds★★★
1379Find a Corresponding Node of a Binary Tree in a Clone of That Tree★★
1380Lucky Numbers in a Matrix
1381Design a Stack With Increment Operation★★
1382Balance a Binary Search Tree★★
1383Maximum Performance of a Team★★★
1385Find the Distance Value Between Two Arrays
1386Cinema Seat Allocation★★
1387Sort Integers by The Power Value★★
1388Pizza With 3n Slices★★★
1389Create Target Array in the Given Order
1390Four Divisors★★
1391Check if There is a Valid Path in a Grid★★
1392Longest Happy Prefix★★★
1394Find Lucky Integer in an Array
1395Count Number of Teams★★
1396Design Underground System★★
1397Find All Good Strings★★★
1399Count Largest Group
1400Construct K Palindrome Strings★★
1401Circle and Rectangle Overlapping★★
1402Reducing Dishes★★★
1403Minimum Subsequence in Non-Increasing Order
1404Number of Steps to Reduce a Number in Binary Representation to One★★
1405Longest Happy String★★
1406Stone Game III★★★
1408String Matching in an Array
1409Queries on a Permutation With Key★★
1410HTML Entity Parser★★
1411Number of Ways to Paint N × 3 Grid★★★
1413Minimum Value to Get Positive Step by Step Sum
1414Find the Minimum Number of Fibonacci Numbers Whose Sum Is K★★
1415The k-th Lexicographical String of All Happy Strings of Length n★★
1416Restore The Array★★★
1417Reformat The String
1418Display Table of Food Orders in a Restaurant★★
1419Minimum Number of Frogs Croaking★★
1420Build Array Where You Can Find The Maximum Exactly K Comparisons★★★
1422Maximum Score After Splitting a String
1423Maximum Points You Can Obtain from Cards★★
1424Diagonal Traverse II★★
1425Constrained Subsequence Sum★★★
1431Kids With the Greatest Number of Candies
1432Max Difference You Can Get From Changing an Integer★★
1433Check If a String Can Break Another String★★
1434Number of Ways to Wear Different Hats to Each Other★★★
1436Destination City
1437Check If All 1's Are at Least Length K Places Away
1438Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit★★
1439Find the Kth Smallest Sum of a Matrix With Sorted Rows★★★
1441Build an Array With Stack Operations
1442Count Triplets That Can Form Two Arrays of Equal XOR★★
1443Minimum Time to Collect All Apples in a Tree★★
1444Number of Ways of Cutting a Pizza★★★
1446Consecutive Characters
1447Simplified Fractions★★
1448Count Good Nodes in Binary Tree★★
1449Form Largest Integer With Digits That Add up to Target★★★
1450Number of Students Doing Homework at a Given Time
1451Rearrange Words in a Sentence★★
1452People Whose List of Favorite Companies Is Not a Subset of Another List★★
1453Maximum Number of Darts Inside of a Circular Dartboard★★★
1455Check If a Word Occurs As a Prefix of Any Word in a Sentence
1456Maximum Number of Vowels in a Substring of Given Length★★
1457Pseudo-Palindromic Paths in a Binary Tree★★
1458Max Dot Product of Two Subsequences★★★
1460Make Two Arrays Equal by Reversing Sub-arrays
1461Check If a String Contains All Binary Codes of Size K★★
1462Course Schedule IV★★
1463Cherry Pickup II★★★
1464Maximum Product of Two Elements in an Array
1465Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts★★
1466Reorder Routes to Make All Paths Lead to the City Zero★★
1467Probability of a Two Boxes Having The Same Number of Distinct Balls★★★
1470Shuffle the Array
1471The k Strongest Values in an Array★★
1472Design Browser History★★
1473Paint House III★★★
1475Final Prices With a Special Discount in a Shop
1476Subrectangle Queries★★
1477Find Two Non-overlapping Sub-arrays Each With Target Sum★★
1478Allocate Mailboxes★★★
1480Running Sum of 1d Array
1481Least Number of Unique Integers after K Removals★★
1482Minimum Number of Days to Make m Bouquets★★
1483Kth Ancestor of a Tree Node★★★
1486XOR Operation in an Array
1487Making File Names Unique★★
1488Avoid Flood in The City★★
1489Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree★★★
1491Average Salary Excluding the Minimum and Maximum Salary
1492The kth Factor of n★★
1493Longest Subarray of 1's After Deleting One Element★★
1494Parallel Courses II★★★
1496Path Crossing
1497Check If Array Pairs Are Divisible by k★★
1498Number of Subsequences That Satisfy the Given Sum Condition★★
1499Max Value of Equation★★★
1502Can Make Arithmetic Progression From Sequence
1503Last Moment Before All Ants Fall Out of a Plank★★
1504Count Submatrices With All Ones★★
1505Minimum Possible Integer After at Most K Adjacent Swaps On Digits★★★
1507Reformat Date
1508Range Sum of Sorted Subarray Sums★★
1509Minimum Difference Between Largest and Smallest Value in Three Moves★★
1510Stone Game IV★★★
1512Number of Good Pairs
1513Number of Substrings With Only 1s★★
1514Path with Maximum Probability★★
1515Best Position for a Service Centre★★★
1518Water Bottles
1519Number of Nodes in the Sub-Tree With the Same Label★★
1520Maximum Number of Non-Overlapping Substrings★★★
1521Find a Value of a Mysterious Function Closest to Target★★★
1523Count Odd Numbers in an Interval Range
1524Number of Sub-arrays With Odd Sum★★
1525Number of Good Ways to Split a String★★
1526Minimum Number of Increments on Subarrays to Form a Target Array★★★
1528Shuffle String
1529Bulb Switcher IV★★
1530Number of Good Leaf Nodes Pairs★★
1531String Compression II★★★
1534Count Good Triplets
1535Find the Winner of an Array Game★★
1536Minimum Swaps to Arrange a Binary Grid★★
1537Get the Maximum Score★★★
1539Kth Missing Positive Number
1540Can Convert String in K Moves★★
1541Minimum Insertions to Balance a Parentheses String★★
1542Find Longest Awesome Substring★★★
1544Make The String Great
1545Find Kth Bit in Nth Binary String★★
1546Maximum Number of Non-Overlapping Subarrays With Sum Equals Target★★
1547Minimum Cost to Cut a Stick★★★
1550Three Consecutive Odds
1551Minimum Operations to Make Array Equal★★
1552Magnetic Force Between Two Balls★★
1553Minimum Number of Days to Eat N Oranges★★★
1556Thousand Separator
1557Minimum Number of Vertices to Reach All Nodes★★
1558Minimum Numbers of Function Calls to Make Target Array★★
1559Detect Cycles in 2D Grid★★★
1560Most Visited Sector in a Circular Track
1561Maximum Number of Coins You Can Get★★
1562Find Latest Group of Size M★★
1563Stone Game V★★★
1566Detect Pattern of Length M Repeated K or More Times
1567Maximum Length of Subarray With Positive Product★★
1568Minimum Number of Days to Disconnect Island★★★
1569Number of Ways to Reorder Array to Get Same BST★★★
1572Matrix Diagonal Sum
1573Number of Ways to Split a String★★
1574Shortest Subarray to be Removed to Make Array Sorted★★
1575Count All Possible Routes★★★
1576Replace All ?'s to Avoid Consecutive Repeating Characters
1577Number of Ways Where Square of Number Is Equal to Product of Two Numbers★★
1578Minimum Deletion Cost to Avoid Repeating Letters★★
1579Remove Max Number of Edges to Keep Graph Fully Traversable★★★
1582Special Positions in a Binary Matrix
1583Count Unhappy Friends★★
1584Min Cost to Connect All Points★★
1585Check If String Is Transformable With Substring Sort Operations★★★
1588Sum of All Odd Length Subarrays
1589Maximum Sum Obtained of Any Permutation★★
1590Make Sum Divisible by P★★
1591Strange Printer II★★★
1592Rearrange Spaces Between Words
1593Split a String Into the Max Number of Unique Substrings★★
1594Maximum Non Negative Product in a Matrix★★
1595Minimum Cost to Connect Two Groups of Points★★★
1598Crawler Log Folder
1599Maximum Profit of Operating a Centennial Wheel★★
1600Throne Inheritance★★
1601Maximum Number of Achievable Transfer Requests★★★
1603Design Parking System
1604Alert Using Same Key-Card Three or More Times in a One Hour Period★★
1605Find Valid Matrix Given Row and Column Sums★★
1606Find Servers That Handled Most Number of Requests★★★
1608Special Array With X Elements Greater Than or Equal X
1609Even Odd Tree★★
1610Maximum Number of Visible Points★★★
1611Minimum One Bit Operations to Make Integers Zero★★★
1614Maximum Nesting Depth of the Parentheses
1615Maximal Network Rank★★
1616Split Two Strings to Make Palindrome★★
1617Count Subtrees With Max Distance Between Cities★★★
1619Mean of Array After Removing Some Elements
1620Coordinate With Maximum Network Quality★★
1621Number of Sets of K Non-Overlapping Line Segments★★
1622Fancy Sequence★★★
1624Largest Substring Between Two Equal Characters
1625Lexicographically Smallest String After Applying Operations★★
1626Best Team With No Conflicts★★
1627Graph Connectivity With Threshold★★★
1629Slowest Key
1630Arithmetic Subarrays★★
1631Path With Minimum Effort★★
1632Rank Transform of a Matrix★★★
1636Sort Array by Increasing Frequency
1637Widest Vertical Area Between Two Points Containing No Points★★
1638Count Substrings That Differ by One Character★★
1639Number of Ways to Form a Target String Given a Dictionary★★★
1640Check Array Formation Through Concatenation
1641Count Sorted Vowel Strings★★
1642Furthest Building You Can Reach★★
1643Kth Smallest Instructions★★★
1646Get Maximum in Generated Array
1647Minimum Deletions to Make Character Frequencies Unique★★
1648Sell Diminishing-Valued Colored Balls★★
1649Create Sorted Array through Instructions★★★
1652Defuse the Bomb
1653Minimum Deletions to Make String Balanced★★
1654Minimum Jumps to Reach Home★★
1655Distribute Repeating Integers★★★
1656Design an Ordered Stream
1657Determine if Two Strings Are Close★★
1658Minimum Operations to Reduce X to Zero★★
1659Maximize Grid Happiness★★★
1662Check If Two String Arrays are Equivalent
1663Smallest String With A Given Numeric Value★★
1664Ways to Make a Fair Array★★
1665Minimum Initial Energy to Finish Tasks★★★
1668Maximum Repeating Substring
1669Merge In Between Linked Lists★★
1670Design Front Middle Back Queue★★
1671Minimum Number of Removals to Make Mountain Array★★★
1672Richest Customer Wealth
1673Find the Most Competitive Subsequence★★
1674Minimum Moves to Make Array Complementary★★
1675Minimize Deviation in Array★★★
1678Goal Parser Interpretation
1679Max Number of K-Sum Pairs★★
1680Concatenation of Consecutive Binary Numbers★★
1681Minimum Incompatibility★★★
1684Count the Number of Consistent Strings
1685Sum of Absolute Differences in a Sorted Array★★
1686Stone Game VI★★
1687Delivering Boxes from Storage to Ports★★★
1688Count of Matches in Tournament
1689Partitioning Into Minimum Number Of Deci-Binary Numbers★★
1690Stone Game VII★★
1691Maximum Height by Stacking Cuboids ★★★
1694Reformat Phone Number
1695Maximum Erasure Value★★
1696Jump Game VI★★
1697Checking Existence of Edge Length Limited Paths★★★
1700Number of Students Unable to Eat Lunch
1701Average Waiting Time★★
1702Maximum Binary String After Change★★
1703Minimum Adjacent Swaps for K Consecutive Ones★★★
1704Determine if String Halves Are Alike
1705Maximum Number of Eaten Apples★★
1706Where Will the Ball Fall★★
1707Maximum XOR With an Element From Array★★★
1710Maximum Units on a Truck
1711Count Good Meals★★
1712Ways to Split Array Into Three Subarrays★★
1713Minimum Operations to Make a Subsequence★★★
1716Calculate Money in Leetcode Bank
1717Maximum Score From Removing Substrings★★
1718Construct the Lexicographically Largest Valid Sequence★★
1719Number Of Ways To Reconstruct A Tree★★★
1720Decode XORed Array
1721Swapping Nodes in a Linked List★★
1722Minimize Hamming Distance After Swap Operations★★
1723Find Minimum Time to Finish All Jobs★★★
1725Number Of Rectangles That Can Form The Largest Square
1726Tuple with Same Product★★
1727Largest Submatrix With Rearrangements★★
1728Cat and Mouse II★★★