Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 706 | Unique Number of Occurrences | Easy | ArrayHash Table |
| 707 | Unique Word Abbreviation | Medium | ArrayHash TableString |
| 708 | Using a Robot to Print the Lexicographically Smallest String | Medium | Hash TableStringStack |
| 709 | Valid Anagram | Easy | Hash TableStringSorting |
| 710 | Valid Sudoku | Medium | ArrayHash TableMatrix |
| 711 | Verifying an Alien Dictionary | Easy | ArrayHash TableString |
| 712 | Vertical Order Traversal of a Binary Tree | Hard | Hash TableTreeDepth-First Search |
| 713 | Vowel Spellchecker | Medium | ArrayHash TableString |
| 714 | Walking Robot Simulation | Medium | ArrayHash TableSimulation |
| 715 | Widest Pair of Indices With Equal Range Sum | Medium | ArrayHash TablePrefix Sum |
| 716 | Word Break | Medium | ArrayHash TableString |
| 717 | Word Break II | Hard | ArrayHash TableString |
| 718 | Word Ladder | Hard | Hash TableStringBreadth-First Search |
| 719 | Word Ladder II | Hard | Hash TableStringBacktracking |
| 720 | Word Pattern | Easy | Hash TableString |
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