2324 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 876. Middle of the Linked List | Easy | 49% | TopicsLinked ListTwo Pointers |
| 1004. Max Consecutive Ones III | Medium | 49% | TopicsArrayBinary SearchSliding WindowPrefix Sum |
| 3625. Count Number of Trapezoids II | Hard | 49% | TopicsArrayHash TableMathGeometry |
| 219. Contains Duplicate II | Easy | 48.8% | TopicsArrayHash TableSliding Window |
| 1480. Running Sum of 1d Array | Easy | 48.6% | TopicsArrayPrefix Sum |
| 739. Daily Temperatures | Medium | 48.3% | TopicsArrayStackMonotonic Stack |
| Best Time to Buy and Sell Stock II | Medium | 48.1% | TopicsArrayDynamic ProgrammingGreedy |
| 322. Coin Change | Medium | 48.1% | TopicsArrayDynamic ProgrammingBreadth-First SearchKnapsack ProblemComplete Knapsack |
| First Missing Positive | Hard | 47.9% | TopicsArrayHash Table |
| 912. Sort an Array | Medium | 47.9% | TopicsArrayDivide and ConquerSortingHeap (Priority Queue)Merge SortBucket SortRadix SortCounting Sort |
| 58. Length of Last Word | Easy | 47.6% | TopicsString |
| 39. Combination Sum | Medium | 47.4% | TopicsArrayBacktracking |
| 124. Binary Tree Maximum Path Sum | Hard | 47.4% | TopicsDynamic ProgrammingTreeDepth-First SearchBinary TreeDP on Trees |
| 344. Reverse String | Easy | 47.1% | TopicsTwo PointersString |
| Find All Numbers Disappeared in an Array | Easy | 47.1% | TopicsArrayHash Table |
| Candy | Hard | 47.1% | TopicsArrayGreedy |
| 141. Linked List Cycle | Easy | 47.1% | TopicsHash TableLinked ListTwo PointersFloyd's Cycle Finding Algorithm |
| 25. Reverse Nodes in k-Group | Hard | 46.9% | TopicsLinked ListRecursion |
| 36. Valid Sudoku | Medium | 46.6% | TopicsArrayHash TableMatrix |
| Employees Earning More Than Their Managers | Easy | 46.4% | TopicsDatabase |
| Insert Delete GetRandom O(1) | Medium | 46.4% | TopicsArrayHash TableMathDesignRandomized |
| 907. Sum of Subarray Minimums | Medium | 46.4% | TopicsArrayDynamic ProgrammingStackMonotonic Stack |
| 3355. Zero Array Transformation I | Medium | 46.4% | TopicsArrayPrefix Sum |
| 131. Palindrome Partitioning | Medium | 46.1% | TopicsStringDynamic ProgrammingBacktracking |
| Reverse Words in a String | Medium | 46.1% | TopicsTwo PointersString |
