TikTok
317 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 146. LRU Cache | Medium | 100% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 200. Number of Islands | Medium | 95.9% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| Meeting Rooms II | Medium | 85.7% | TopicsArrayTwo PointersGreedySortingHeap (Priority Queue)Prefix Sum |
| 300. Longest Increasing Subsequence | Medium | 85.7% | TopicsArrayBinary SearchDynamic ProgrammingLongest Increasing Subsequence |
| Number of Distinct Islands | Medium | 85% | TopicsArrayHash TableDepth-First SearchBreadth-First SearchUnion-FindSortingMatrixHash Function |
| 3. Longest Substring Without Repeating Characters | Medium | 84.3% | TopicsHash TableStringSliding Window |
| 207. Course Schedule | Medium | 82.7% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological SortDirected Acyclic Graph |
| 56. Merge Intervals | Medium | 81.9% | TopicsArraySortingQuicksort |
| Text Justification | Hard | 81% | TopicsArrayStringSimulation |
| 42. Trapping Rain Water | Hard | 79.1% | TopicsArrayTwo PointersDynamic ProgrammingStackMonotonic Stack |
| 51. N-Queens | Hard | 74.9% | TopicsArrayBacktrackingAlgorithm X |
| 827. Making A Large Island | Hard | 74.9% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| 33. Search in Rotated Sorted Array | Medium | 72.5% | TopicsArrayBinary Search |
| 54. Spiral Matrix | Medium | 72.5% | TopicsArrayMatrixSimulation |
| 76. Minimum Window Substring | Hard | 72.5% | TopicsHash TableStringSliding Window |
| Decode String | Medium | 72.5% | TopicsStringStackRecursion |
| 210. Course Schedule II | Medium | 71.1% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort |
| 560. Subarray Sum Equals K | Medium | 71.1% | TopicsArrayHash TablePrefix Sum |
| 79. Word Search | Medium | 69.7% | TopicsArrayStringBacktrackingDepth-First SearchMatrix |
| 322. Coin Change | Medium | 69.7% | TopicsArrayDynamic ProgrammingBreadth-First SearchKnapsack ProblemComplete Knapsack |
| 3Sum | Medium | 68.2% | TopicsArrayTwo PointersSorting |
| 198. House Robber | Medium | 68.2% | TopicsArrayDynamic Programming |
| Maximum Swap | Medium | 68.2% | TopicsMathGreedy |
| 1405. Longest Happy String | Medium | 68.2% | TopicsStringGreedyHeap (Priority Queue) |
| 1146. Snapshot Array | Medium | 68.2% | TopicsArrayHash TableBinary SearchDesignPersistent Data Structure |
