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93 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 200. Number of Islands | Medium | 71% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| 49. Group Anagrams | Medium | 67.4% | TopicsArrayHash TableStringSorting |
| 295. Find Median from Data Stream | Hard | 67.4% | TopicsTwo PointersDesignSortingHeap (Priority Queue)Data Stream |
| 33. Search in Rotated Sorted Array | Medium | 63.1% | TopicsArrayBinary Search |
| 121. Best Time to Buy and Sell Stock | Easy | 63.1% | TopicsArrayDynamic Programming |
| 1353. Maximum Number of Events That Can Be Attended | Medium | 63.1% | TopicsArrayGreedySortingHeap (Priority Queue) |
| 1046. Last Stone Weight | Easy | 63.1% | TopicsArrayHeap (Priority Queue) |
| Asteroid Collision | Medium | 63.1% | TopicsArrayStackSimulation |
| 1283. Find the Smallest Divisor Given a Threshold | Medium | 57.9% | TopicsArrayBinary Search |
| LFU Cache | Hard | 57.9% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 36. Valid Sudoku | Medium | 57.9% | TopicsArrayHash TableMatrix |
| 1202. Smallest String With Swaps | Medium | 57.9% | TopicsArrayHash TableStringDepth-First SearchBreadth-First SearchUnion-FindSorting |
| 1. Two Sum | Easy | 51.2% | TopicsArrayHash Table |
| 20. Valid Parentheses | Easy | 51.2% | TopicsStringStackBracket Sequences |
| 347. Top K Frequent Elements | Medium | 51.2% | TopicsArrayHash TableDivide and ConquerSortingHeap (Priority Queue)Bucket SortCountingQuickselect |
| 560. Subarray Sum Equals K | Medium | 51.2% | TopicsArrayHash TablePrefix Sum |
| 851. Loud and Rich | Medium | 51.2% | TopicsArrayDepth-First SearchGraph TheoryTopological SortDirected Acyclic Graph |
| 198. House Robber | Medium | 51.2% | TopicsArrayDynamic Programming |
| 53. Maximum Subarray | Medium | 51.2% | TopicsArrayDivide and ConquerDynamic Programming |
| Random Pick with Weight | Medium | 51.2% | TopicsArrayMathBinary SearchPrefix SumRandomized |
| 162. Find Peak Element | Medium | 51.2% | TopicsArrayBinary Search |
| Degree of an Array | Easy | 51.2% | TopicsArrayHash Table |
| 54. Spiral Matrix | Medium | 51.2% | TopicsArrayMatrixSimulation |
| 647. Palindromic Substrings | Medium | 51.2% | TopicsTwo PointersStringDynamic Programming |
| Longest Consecutive Sequence | Medium | 51.2% | TopicsArrayHash TableUnion-Find |
