Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3346 | Valid Word | Easy | String |
| 3347 | Valid Word Square | Easy | ArrayMatrix |
| 3348 | Validate Binary Search Tree | Medium | TreeDepth-First SearchBinary Search Tree |
| 3349 | Validate Binary Tree Nodes | Medium | TreeDepth-First SearchBreadth-First Search |
| 3350 | Validate IP Address | Medium | String |
| 3351 | Validate Stack Sequences | Medium | ArrayStackSimulation |
| 3352 | Verbal Arithmetic Puzzle | Hard | ArrayMathString |
| 3353 | Verify Preorder Sequence in Binary Search Tree | Medium | ArrayStackTree |
| 3354 | Verify Preorder Serialization of a Binary Tree | Medium | StringStackTree |
| 3355 | Verifying an Alien Dictionary | Easy | ArrayHash TableString |
| 3356 | Video Stitching | Medium | ArrayDynamic ProgrammingGreedy |
| 3357 | Viewers Turned Streamers | Hard | Database |
| 3358 | Visit Array Positions to Maximize Score | Medium | ArrayDynamic Programming |
| 3359 | Vowel Spellchecker | Medium | ArrayHash TableString |
| 3360 | Vowels Game in a String | Medium | MathStringBrainteaser |
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