Practice problems across 75+ categories
Practice problems frequently asked at Sorting • 464 problems | 89 Easy | 273 Medium | 101 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 46 | Check if Strings Can be Made Equal With Operations II | Medium | Hash TableStringSorting |
| 47 | Checking Existence of Edge Length Limited Paths | Hard | ArrayTwo PointersUnion Find |
| 48 | Choose K Elements With Maximum Sum | Medium | ArraySortingHeap (Priority Queue) |
| 49 | Closest Room | Hard | ArrayBinary SearchSorting |
| 50 | Closest Subsequence Sum | Hard | ArrayTwo PointersDynamic Programming |
| 51 | Compare Strings by Frequency of the Smallest Character | Medium | ArrayHash TableString |
| 52 | Concatenated Words | Hard | ArrayStringDynamic Programming |
| 53 | Contains Duplicate | Easy | ArrayHash TableSorting |
| 54 | Contains Duplicate III | Hard | ArraySliding WindowSorting |
| 55 | Count Almost Equal Pairs I | Medium | ArrayHash TableSorting |
| 56 | Count Almost Equal Pairs II | Hard | ArrayHash TableSorting |
| 57 | Count Covered Buildings | Medium | ArrayHash TableSorting |
| 58 | Count Days Without Meetings | Medium | ArraySorting |
| 59 | Count Elements With Strictly Smaller and Greater Elements | Easy | ArraySortingCounting |
| 60 | Count Mentions Per User | Medium | ArrayMathSorting |
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