Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 496 | Minimum Unique Word Abbreviation | Hard | ArrayStringBacktracking |
| 497 | Minimum White Tiles After Covering With Carpets | Hard | StringDynamic ProgrammingPrefix Sum |
| 498 | Minimum Window Subsequence | Hard | StringDynamic ProgrammingSliding Window |
| 499 | Minimum Window Substring | Hard | Hash TableStringSliding Window |
| 500 | Most Common Word | Easy | ArrayHash TableString |
| 501 | Most Popular Video Creator | Medium | ArrayHash TableString |
| 502 | Move Pieces to Obtain a String | Medium | Two PointersString |
| 503 | Multiply Strings | Medium | MathStringSimulation |
| 504 | Naming a Company | Hard | ArrayHash TableString |
| 505 | Next Closest Time | Medium | Hash TableStringBacktracking |
| 506 | Next Greater Element III | Medium | MathTwo PointersString |
| 507 | Next Palindrome Using Same Digits | Hard | Two PointersString |
| 508 | Number of Atoms | Hard | Hash TableStringStack |
| 509 | Number of Beautiful Partitions | Hard | StringDynamic ProgrammingPrefix Sum |
| 510 | Number of Changing Keys | Easy | String |
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