Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3016 | Sparse Matrix Multiplication | Medium | ArrayHash TableMatrix |
| 3017 | Special Array I | Easy | Array |
| 3018 | Special Array II | Medium | ArrayBinary SearchPrefix Sum |
| 3019 | Special Array With X Elements Greater Than or Equal X | Easy | ArrayBinary SearchSorting |
| 3020 | Special Binary String | Hard | StringRecursion |
| 3021 | Special Permutations | Medium | ArrayDynamic ProgrammingBit Manipulation |
| 3022 | Special Positions in a Binary Matrix | Easy | ArrayMatrix |
| 3023 | Spiral Matrix | Medium | ArrayMatrixSimulation |
| 3024 | Spiral Matrix II | Medium | ArrayMatrixSimulation |
| 3025 | Spiral Matrix III | Medium | ArrayMatrixSimulation |
| 3026 | Spiral Matrix IV | Medium | ArrayLinked ListMatrix |
| 3027 | Split a Circular Linked List | Medium | Linked ListTwo Pointers |
| 3028 | Split a String in Balanced Strings | Easy | StringGreedyCounting |
| 3029 | Split a String Into the Max Number of Unique Substrings | Medium | Hash TableStringBacktracking |
| 3030 | Split Array into Consecutive Subsequences | Medium | ArrayHash TableGreedy |
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