Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 556 | Number of Unique Good Subsequences | Hard | StringDynamic Programming |
| 557 | Number of Valid Clock Times | Easy | StringEnumeration |
| 558 | Number of Valid Move Combinations On Chessboard | Hard | ArrayStringBacktracking |
| 559 | Number of Valid Words for Each Puzzle | Hard | ArrayHash TableString |
| 560 | Number of Valid Words in a Sentence | Easy | String |
| 561 | Number of Ways to Divide a Long Corridor | Hard | MathStringDynamic Programming |
| 562 | Number of Ways to Form a Target String Given a Dictionary | Hard | ArrayStringDynamic Programming |
| 563 | Number of Ways to Select Buildings | Medium | StringDynamic ProgrammingPrefix Sum |
| 564 | Number of Ways to Separate Numbers | Hard | StringDynamic ProgrammingSuffix Array |
| 565 | Number of Ways to Split a String | Medium | MathString |
| 566 | Number of Wonderful Substrings | Medium | Hash TableStringBit Manipulation |
| 567 | Numbers At Most N Given Digit Set | Hard | ArrayMathString |
| 568 | Occurrences After Bigram | Easy | String |
| 569 | Odd String Difference | Easy | ArrayHash TableString |
| 570 | One Edit Distance | Medium | Two PointersString |
Powerful online tools to boost your productivity
Coding Ground For Developers
Code, Edit, Run and ShareIgnite your coding potential on Coding Ground - an immersive online platform for hands-on learning, collaboration, and skill development.
