Practice problems across 75+ categories
Practice problems frequently asked at Sorting • 464 problems | 89 Easy | 273 Medium | 101 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 61 | Count Number of Rectangles Containing Each Point | Medium | ArrayHash TableBinary Search |
| 62 | Count Pairs in Two Arrays | Medium | ArrayTwo PointersBinary Search |
| 63 | Count Pairs Of Nodes | Hard | ArrayHash TableTwo Pointers |
| 64 | Count Pairs Whose Sum is Less than Target | Easy | ArrayTwo PointersBinary Search |
| 65 | Count the Number of Fair Pairs | Medium | ArrayTwo PointersBinary Search |
| 66 | Count the Number of K-Free Subsets | Medium | ArrayMathDynamic Programming |
| 67 | Count Ways to Group Overlapping Ranges | Medium | ArraySorting |
| 68 | Count Words Obtained After Adding a Letter | Medium | ArrayHash TableString |
| 69 | Count Zero Request Servers | Medium | ArrayHash TableSliding Window |
| 70 | Course Schedule III | Hard | ArrayGreedySorting |
| 71 | Custom Sort String | Medium | Hash TableStringSorting |
| 72 | Delete Greatest Value in Each Row | Easy | ArraySortingHeap (Priority Queue) |
| 73 | Describe the Painting | Medium | ArrayHash TableSorting |
| 74 | Design a File Sharing System | Medium | Hash TableDesignSorting |
| 75 | Design A Leaderboard | Medium | Hash TableDesignSorting |
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