Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3376 | Winning Candidate | Medium | Database |
| 3377 | Word Break | Medium | ArrayHash TableString |
| 3378 | Word Break II | Hard | ArrayHash TableString |
| 3379 | Word Frequency | Medium | Shell |
| 3380 | Word Ladder | Hard | Hash TableStringBreadth-First Search |
| 3381 | Word Ladder II | Hard | Hash TableStringBacktracking |
| 3382 | Word Pattern | Easy | Hash TableString |
| 3383 | Word Pattern II | Medium | Hash TableStringBacktracking |
| 3384 | Word Search | Medium | ArrayStringBacktracking |
| 3385 | Word Search II | Hard | ArrayStringBacktracking |
| 3386 | Word Subsets | Medium | ArrayHash TableString |
| 3387 | Words Within Two Edits of Dictionary | Medium | ArrayStringTrie |
| 3388 | X of a Kind in a Deck of Cards | Easy | ArrayHash TableMath |
| 3389 | XOR Operation in an Array | Easy | MathBit Manipulation |
| 3390 | XOR Queries of a Subarray | Medium | ArrayBit ManipulationPrefix Sum |
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