Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2881 | Winning Candidate | Medium | Database |
| 2882 | Word Break | Medium | ArrayHash TableString |
| 2883 | Word Frequency | Medium | Shell |
| 2884 | Word Ladder | Hard | Hash TableStringBreadth-First Search |
| 2885 | Word Ladder II | Hard | Hash TableStringBacktracking |
| 2886 | Word Pattern | Easy | Hash TableString |
| 2887 | Word Pattern II | Medium | Hash TableStringBacktracking |
| 2888 | Word Search | Medium | ArrayStringBacktracking |
| 2889 | Word Search II | Hard | ArrayStringBacktracking |
| 2890 | Words Within Two Edits of Dictionary | Medium | ArrayStringTrie |
| 2891 | X of a Kind in a Deck of Cards | Easy | ArrayHash TableMath |
| 2892 | XOR Queries of a Subarray | Medium | ArrayBit ManipulationPrefix Sum |
| 2893 | Year on Year Growth Rate | Hard | Database |
| 2894 | Zero Array Transformation I | Medium | ArrayPrefix Sum |
| 2895 | Zero Array Transformation II | Medium | ArrayBinary SearchPrefix Sum |
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