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- # Title Acceptance Difficulty Frequency
- 1007
- Minimum Domino Rotations For Equal Row 50.6% Medium
- 843
- Guess the Word 45.4% Hard
- 1153
- String Transforms Into Another String
- 34.4% Hard
- 410
- Split Array Largest Sum 43.4% Hard
- 809
- Expressive Words 45.9% Medium
- 1057
- Campus Bikes
- 58.4% Medium
- 1
- Two Sum 44.9% Easy
- 1170
- Compare Strings by Frequency of the Smallest Character 58.2% Easy
- 465
- Optimal Account Balancing
- 45.2% Hard
- 1088
- Confusing Number II
- 39.6% Hard
- 222
- Count Complete Tree Nodes 39.7% Medium
- 1055
- Shortest Way to Form String
- 57.1% Medium
- 1110
- Delete Nodes And Return Forest 65.0% Medium
- 363
- Max Sum of Rectangle No Larger Than K 36.0% Hard
- 659
- Split Array into Consecutive Subsequences 42.6% Medium
- 359
- Logger Rate Limiter
- 68.0% Easy
- 801
- Minimum Swaps To Make Sequences Increasing 37.4% Medium
- 315
- Count of Smaller Numbers After Self 40.2% Hard
- 482
- License Key Formatting 42.4% Easy
- 727
- Minimum Window Subsequence
- 40.1% Hard
- 299
- Bulls and Cows 41.1% Easy
- 1231
- Divide Chocolate
- 50.8% Hard
- 430
- Flatten a Multilevel Doubly Linked List 47.3% Medium
- 552
- Student Attendance Record II 34.9% Hard
- 642
- Design Search Autocomplete System
- 41.8% Hard
- 1096
- Brace Expansion II 61.0% Hard
- 889
- Construct Binary Tree from Preorder and Postorder Traversal 63.8% Medium
- 1066
- Campus Bikes II
- 53.3% Medium
- 947
- Most Stones Removed with Same Row or Column 54.9% Medium
- 753
- Cracking the Safe 49.1% Hard
- 837
- New 21 Game 33.5% Medium
- 271
- Encode and Decode Strings
- 29.4% Medium
- 1087
- Brace Expansion
- 61.3% Medium
- 679
- 24 Game 44.6% Hard
- 951
- Flip Equivalent Binary Trees 65.5% Medium
- 844
- Backspace String Compare 47.0% Easy
- 743
- Network Delay Time 44.9% Medium
- 835
- Image Overlap 55.2% Medium
- 939
- Minimum Area Rectangle 51.9% Medium
- 1011
- Capacity To Ship Packages Within D Days 56.0% Medium
- 1032
- Stream of Characters 46.1% Hard
- 489
- Robot Room Cleaner
- 67.2% Hard
- 846
- Hand of Straights 51.1% Medium
- 1168
- Optimize Water Distribution in a Village
- 58.5% Hard
- 1219
- Path with Maximum Gold 62.3% Medium
- 1145
- Binary Tree Coloring Game 49.9% Medium
- 981
- Time Based Key-Value Store 51.9% Medium
- 726
- Number of Atoms 46.6% Hard
- 1197
- Minimum Knight Moves
- 31.9% Medium
- 752
- Open the Lock 48.5% Medium
- 1048
- Longest String Chain 51.9% Medium
- 1146
- Snapshot Array 35.0% Medium
- 68
- Text Justification 25.4% Hard
- 777
- Swap Adjacent in LR String 34.3% Medium
- 562
- Longest Line of Consecutive One in Matrix
- 44.9% Medium
- 317
- Shortest Distance from All Buildings
- 39.7% Hard
- 833
- Find And Replace in String 48.6% Medium
- 353
- Design Snake Game
- 32.4% Medium
- 298
- Binary Tree Longest Consecutive Sequence
- 45.6% Medium
- 329
- Longest Increasing Path in a Matrix 41.8% Hard
- 4
- Median of Two Sorted Arrays 28.0% Hard
- 722
- Remove Comments 32.8% Medium
- 772
- Basic Calculator III
- 40.9% Hard
- 163
- Missing Ranges
- 23.7% Medium
- 528
- Random Pick with Weight 43.3% Medium
- 200
- Number of Islands 44.2% Medium
- 23
- Merge k Sorted Lists 37.5% Hard
- 221
- Maximal Square 34.9% Medium
- 815
- Bus Routes 41.5% Hard
- 248
- Strobogrammatic Number III
- 38.2% Hard
- 862
- Shortest Subarray with Sum at Least K 22.9% Hard
- 459
- Repeated Substring Pattern 41.1% Easy
- 1203
- Sort Items by Groups Respecting Dependencies 45.4% Hard
- 1157
- Online Majority Element In Subarray 35.0% Hard
- 42
- Trapping Rain Water 46.2% Hard
- 1074
- Number of Submatrices That Sum to Target 59.9% Hard
- 551
- Student Attendance Record I 46.3% Easy
- 304
- Range Sum Query 2D - Immutable 35.5% Medium
- 158
- Read N Characters Given Read4 II - Call multiple times
- 29.9% Hard
- 43
- Multiply Strings 32.3% Medium
- 708
- Insert into a Sorted Circular Linked List
- 31.1% Medium
- 774
- Minimize Max Distance to Gas Station
- 44.7% Hard
- 855
- Exam Room 40.9% Medium
- 208
- Implement Trie (Prefix Tree) 42.7% Medium
- 85
- Maximal Rectangle 35.5% Hard
- 91
- Decode Ways 23.4% Medium
- 1188
- Design Bounded Blocking Queue
- 66.1% Medium
- 340
- Longest Substring with At Most K Distinct Characters
- 42.1% Hard
- 818
- Race Car 37.4% Hard
- 731
- My Calendar II 47.1% Medium
- 444
- Sequence Reconstruction
- 21.2% Medium
- 776
- Split BST
- 53.8% Medium
- 932
- Beautiful Array 56.0% Medium
- 817
- Linked List Components 56.2% Medium
- 76
- Minimum Window Substring 32.9% Hard
- 205
- Isomorphic Strings 38.8% Easy
- 604
- Design Compressed String Iterator
- 36.0% Easy
- 737
- Sentence Similarity II
- 44.8% Medium
- 56
- Merge Intervals 37.5% Medium
- 900
- RLE Iterator 52.2% Medium
- 360
- Sort Transformed Array
- 47.7% Medium
- 320
- Generalized Abbreviation
- 50.2% Medium
- 895
- Maximum Frequency Stack 59.2% Hard
- 53
- Maximum Subarray 45.3% Easy
- 729
- My Calendar I 49.6% Medium
- 723
- Candy Crush
- 66.4% Medium
- 986
- Interval List Intersections 64.7% Medium
- 385
- Mini Parser 32.8% Medium
- 239
- Sliding Window Maximum 40.3% Hard
- 950
- Reveal Cards In Increasing Order 72.9% Medium
- 288
- Unique Word Abbreviation
- 21.0% Medium
- 57
- Insert Interval 32.3% Hard
- 253
- Meeting Rooms II
- 44.4% Medium
- 720
- Longest Word in Dictionary 46.7% Easy
- 394
- Decode String 47.6% Medium
- 325
- Maximum Size Subarray Sum Equals k
- 46.0% Medium
- 210
- Course Schedule II 37.5% Medium
- 871
- Minimum Number of Refueling Stops 30.7% Hard
- 31
- Next Permutation 31.5% Medium
- 692
- Top K Frequent Words 48.5% Medium
- 560
- Subarray Sum Equals K 43.3% Medium
- 767
- Reorganize String 45.6% Medium
- 124
- Binary Tree Maximum Path Sum 31.9% Hard
- 115
- Distinct Subsequences 36.4% Hard
- 632
- Smallest Range Covering Elements from K Lists 50.2% Hard
- 853
- Car Fleet 41.6% Medium
- 336
- Palindrome Pairs 32.5% Hard
- 128
- Longest Consecutive Sequence 43.5% Hard
- 274
- H-Index 35.1% Medium
- 925
- Long Pressed Name 44.5% Easy
- 212
- Word Search II 31.4% Hard
- 821
- Shortest Distance to a Character 65.2% Easy
- 1091
- Shortest Path in Binary Matrix 37.0% Medium
- 1209
- Remove All Adjacent Duplicates in String II 56.6% Medium
- 362
- Design Hit Counter
- 61.5% Medium
- 17
- Letter Combinations of a Phone Number 44.2% Medium
- 209
- Minimum Size Subarray Sum 36.3% Medium
- 1165
- Single-Row Keyboard
- 84.2% Easy
- 173
- Binary Search Tree Iterator 52.3% Medium
- 328
- Odd Even Linked List 51.4% Medium
- 949
- Largest Time for Given Digits 35.2% Easy
- 593
- Valid Square 41.4% Medium
- 1031
- Maximum Sum of Two Non-Overlapping Subarrays 55.4% Medium
- 392
- Is Subsequence 47.8% Easy
- 295
- Find Median from Data Stream 40.4% Hard
- 769
- Max Chunks To Make Sorted 53.4% Medium
- 34
- Find First and Last Position of Element in Sorted Array 34.8% Medium
- 369
- Plus One Linked List
- 57.4% Medium
- 852
- Peak Index in a Mountain Array 70.6% Easy
- 130
- Surrounded Regions 24.9% Medium
- 139
- Word Break 37.7% Medium
- 140
- Word Break II 29.2% Hard
- 524
- Longest Word in Dictionary through Deleting 47.4% Medium
- 773
- Sliding Puzzle 56.0% Hard
- 681
- Next Closest Time
- 43.6% Medium
- 146
- LRU Cache 29.1% Medium
- 424
- Longest Repeating Character Replacement 45.1% Medium
- 1105
- Filling Bookcase Shelves 57.3% Medium
- 354
- Russian Doll Envelopes 34.8% Hard
- 311
- Sparse Matrix Multiplication
- 58.6% Medium
- 399
- Evaluate Division 49.6% Medium
- 149
- Max Points on a Line 16.4% Hard
- 218
- The Skyline Problem 33.1% Hard
- 3
- Longest Substring Without Repeating Characters 29.3% Medium
- 1000
- Minimum Cost to Merge Stones 38.1% Hard
- 41
- First Missing Positive 30.4% Hard
- 72
- Edit Distance 40.7% Hard
- 1056
- Confusing Number
- 50.6% Easy
- 198
- House Robber 41.5% Easy
- 792
- Number of Matching Subsequences 46.1% Medium
- 904
- Fruit Into Baskets 42.0% Medium
- 2
- Add Two Numbers 32.5% Medium
- 33
- Search in Rotated Sorted Array 33.5% Medium
- 375
- Guess Number Higher or Lower II 39.3% Medium
- 247
- Strobogrammatic Number II
- 46.1% Medium
- 567
- Permutation in String 39.8% Medium
- 269
- Alien Dictionary
- 33.5% Hard
- 168
- Excel Sheet Column Title 30.0% Easy
- 1292
- Maximum Side Length of a Square with Sum Less than or Equal to Threshold 42.8% Medium
- 380
- Insert Delete GetRandom O(1) 44.9% Medium
- 490
- The Maze
- 49.7% Medium
- 334
- Increasing Triplet Subsequence 39.8% Medium
- 706
- Design HashMap 58.2% Easy
- 890
- Find and Replace Pattern 72.5% Medium
- 44
- Wildcard Matching 23.8% Hard
- 686
- Repeated String Match 32.0% Easy
- 332
- Reconstruct Itinerary 33.6% Medium
- 10
- Regular Expression Matching 26.0% Hard
- 374
- Guess Number Higher or Lower 41.1% Easy
- 714
- Best Time to Buy and Sell Stock with Transaction Fee 52.6% Medium
- 662
- Maximum Width of Binary Tree 39.6% Medium
- 529
- Minesweeper 56.1% Medium
- 1060
- Missing Element in Sorted Array
- 53.8% Medium
- 273
- Integer to English Words 25.5% Hard
- 150
- Evaluate Reverse Polish Notation 34.3% Medium
- 202
- Happy Number 47.9% Easy
- 307
- Range Sum Query - Mutable 31.6% Medium
- 1027
- Longest Arithmetic Sequence 52.8% Medium
- 15
- 3Sum 25.5% Medium
- 16
- 3Sum Closest 45.7% Medium
- 77
- Combinations 51.3% Medium
- 416
- Partition Equal Subset Sum 42.0% Medium
- 215
- Kth Largest Element in an Array 51.6% Medium
- 310
- Minimum Height Trees 31.2% Medium
- 246
- Strobogrammatic Number
- 43.7% Easy
- 849
- Maximize Distance to Closest Person 41.9% Easy
- 460
- LFU Cache 31.8% Hard
- 54
- Spiral Matrix 32.3% Medium
- 228
- Summary Ranges 37.7% Medium
- 498
- Diagonal Traverse 46.5% Medium
- 285
- Inorder Successor in BST
- 37.5% Medium
- 841
- Keys and Rooms 62.3% Medium
- 39
- Combination Sum 52.4% Medium
- 836
- Rectangle Overlap 48.1% Easy
- 279
- Perfect Squares 43.9% Medium
- 97
- Interleaving String 29.7% Hard
- 30
- Substring with Concatenation of All Words 24.6% Hard
- 113
- Path Sum II 43.6% Medium
- 1155
- Number of Dice Rolls With Target Sum 49.2% Medium
- 206
- Reverse Linked List 58.7% Easy
- 236
- Lowest Common Ancestor of a Binary Tree 41.6% Medium
- 224
- Basic Calculator 35.0% Hard
- 99
- Recover Binary Search Tree 36.9% Hard
- 346
- Moving Average from Data Stream
- 68.5% Easy
- 337
- House Robber III 49.4% Medium
- 166
- Fraction to Recurring Decimal 20.5% Medium
- 785
- Is Graph Bipartite? 45.6% Medium
- 766
- Toeplitz Matrix 63.2% Easy
- 1051
- Height Checker 68.3% Easy
- 523
- Continuous Subarray Sum 24.4% Medium
- 297
- Serialize and Deserialize Binary Tree 44.3% Hard
- 49
- Group Anagrams 51.6% Medium
- 28
- Implement strStr() 33.5% Easy
- 443
- String Compression 39.4% Easy
- 66
- Plus One 41.8% Easy
- 1099
- Two Sum Less Than K
- 60.2% Easy
- 1021
- Remove Outermost Parentheses 76.1% Easy
- 227
- Basic Calculator II 35.4% Medium
- 5
- Longest Palindromic Substring 28.5% Medium
- 127
- Word Ladder 26.9% Medium
- 67
- Add Binary 41.7% Easy
- 152
- Maximum Product Subarray 30.6% Medium
- 965
- Univalued Binary Tree 67.1% Easy
- 207
- Course Schedule 40.3% Medium
- 213
- House Robber II 35.8% Medium
- 1122
- Relative Sort Array 66.8% Easy
- 136
- Single Number 62.4% Easy
- 148
- Sort List 38.7% Medium
- 55
- Jump Game 33.0% Medium
- 162
- Find Peak Element 42.3% Medium
- 724
- Find Pivot Index 42.5% Easy
- 326
- Power of Three 41.9% Easy
- 1143
- Longest Common Subsequence 57.6% Medium
- 231
- Power of Two 42.7% Easy
- 20
- Valid Parentheses 37.8% Easy
- 226
- Invert Binary Tree 61.0% Easy
- 104
- Maximum Depth of Binary Tree 63.4% Easy
- 322
- Coin Change 33.0% Medium
- 46
- Permutations 59.3% Medium
- 18
- 4Sum 32.2% Medium
- 122
- Best Time to Buy and Sell Stock II 53.9% Easy
- 40
- Combination Sum II 44.9% Medium
- 739
- Daily Temperatures 61.6% Medium
- 22
- Generate Parentheses 58.8% Medium
- 121
- Best Time to Buy and Sell Stock 49.0% Easy
- 32
- Longest Valid Parentheses 27.0% Hard
- 63
- Unique Paths II 33.8% Medium
- 88
- Merge Sorted Array 37.7% Easy
- 238
- Product of Array Except Self 57.9% Medium
- 133
- Clone Graph 30.5% Medium
- 145
- Binary Tree Postorder Traversal 51.6% Hard
- 94
- Binary Tree Inorder Traversal 60.0% Medium
- 283
- Move Zeroes 55.9% Easy
- 38
- Count and Say 42.5% Easy
- 709
- To Lower Case 78.2% Easy
- 977
- Squares of a Sorted Array 72.0% Easy
- 287
- Find the Duplicate Number 52.0% Medium
- 98
- Validate Binary Search Tree 26.8% Medium
- 300
- Longest Increasing Subsequence 41.8% Medium
- 7
- Reverse Integer 25.6% Easy
- 11
- Container With Most Water 48.2% Medium
- 64
- Minimum Path Sum 50.1% Medium
- 543
- Diameter of Binary Tree 48.1% Easy
- 118
- Pascal's Triangle 49.3% Easy
- 75
- Sort Colors 44.2% Medium
- 572
- Subtree of Another Tree 43.4% Easy
- 973
- K Closest Points to Origin 61.5% Medium
- 50
- Pow(x, n) 28.9% Medium
- 79
- Word Search 33.2% Medium
- 9
- Palindrome Number 46.1% Easy
- 78
- Subsets 57.0% Medium
- 167
- Two Sum II - Input array is sorted 52.2% Easy
- 347
- Top K Frequent Elements 58.2% Medium
- 21
- Merge Two Sorted Lists 50.6% Easy
- 169
- Majority Element 55.3% Easy
- 125
- Valid Palindrome 33.5% Easy
- 155
- Min Stack 40.2% Easy
- 242
- Valid Anagram 54.6% Easy
- 141
- Linked List Cycle 39.1% Easy
- 1108
- Defanging an IP Address 85.4% Easy
- 14
- Longest Common Prefix 34.5% Easy
- 344
- Reverse String
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