Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 301 | Isomorphic Strings | Easy | Hash TableString |
| 302 | Iterator for Combination | Medium | StringBacktrackingDesign |
| 303 | Jewels and Stones | Easy | Hash TableString |
| 304 | Jump Game VII | Medium | StringDynamic ProgrammingSliding Window |
| 305 | K-Similar Strings | Hard | Hash TableStringBreadth-First Search |
| 306 | Keyboard Row | Easy | ArrayHash TableString |
| 307 | Kth Distinct String in an Array | Easy | ArrayHash TableString |
| 308 | Largest 3-Same-Digit Number in String | Easy | String |
| 309 | Largest Merge Of Two Strings | Medium | Two PointersStringGreedy |
| 310 | Largest Number | Medium | ArrayStringGreedy |
| 311 | Largest Number After Mutating Substring | Medium | ArrayStringGreedy |
| 312 | Largest Odd Number in String | Easy | MathStringGreedy |
| 313 | Largest Palindromic Number | Medium | Hash TableStringGreedy |
| 314 | Largest Substring Between Two Equal Characters | Easy | Hash TableString |
| 315 | Largest Time for Given Digits | Medium | ArrayStringBacktracking |
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