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1396 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 268. Missing Number | Easy | 42.6% | TopicsArrayHash TableMathBinary SearchBit ManipulationSorting |
| 278. First Bad Version | Easy | 42.6% | TopicsBinary SearchInteractive |
| 286. Walls and Gates | Medium | 42.6% | TopicsArrayBreadth-First SearchMatrix |
| Max Consecutive Ones | Easy | 42.6% | TopicsArray |
| Article Views I | Easy | 42.6% | TopicsDatabase |
| 12. Integer to Roman | Medium | 41.9% | TopicsHash TableMathString |
| 91. Decode Ways | Medium | 41.9% | TopicsStringDynamic Programming |
| Rising Temperature | Easy | 41.9% | TopicsDatabase |
| Shortest Distance from All Buildings | Hard | 41.9% | TopicsArrayBreadth-First SearchMatrix |
| 451. Sort Characters By Frequency | Medium | 41.9% | TopicsHash TableStringSortingHeap (Priority Queue)Bucket SortCounting |
| 1094. Car Pooling | Medium | 41.9% | TopicsArraySortingHeap (Priority Queue)SimulationPrefix Sum |
| Divide Two Integers | Medium | 41.2% | TopicsMathBit Manipulation |
| 74. Search a 2D Matrix | Medium | 41.2% | TopicsArrayBinary SearchMatrix |
| 77. Combinations | Medium | 41.2% | TopicsBacktracking |
| Remove Duplicates from Sorted Array II | Medium | 41.2% | TopicsArrayTwo Pointers |
| Maximal Rectangle | Hard | 41.2% | TopicsArrayDynamic ProgrammingStackMatrixMonotonic Stack |
| 205. Isomorphic Strings | Easy | 41.2% | TopicsHash TableString |
| Sparse Matrix Multiplication | Medium | 41.2% | TopicsArrayHash TableMatrixLinear Algebra |
| 334. Increasing Triplet Subsequence | Medium | 41.2% | TopicsArrayGreedyLongest Increasing Subsequence |
| 934. Shortest Bridge | Medium | 41.2% | TopicsArrayDepth-First SearchBreadth-First SearchMatrix |
| 994. Rotting Oranges | Medium | 41.2% | TopicsArrayBreadth-First SearchMatrix |
| 1443. Minimum Time to Collect All Apples in a Tree | Medium | 41.2% | TopicsHash TableTreeDepth-First SearchBreadth-First SearchDP on Trees |
| 1929. Concatenation of Array | Easy | 41.2% | TopicsArraySimulation |
| 25. Reverse Nodes in k-Group | Hard | 40.5% | TopicsLinked ListRecursion |
| 36. Valid Sudoku | Medium | 40.5% | TopicsArrayHash TableMatrix |
