Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 751 | The k-th Lexicographical String of All Happy Strings of Length n | Medium | StringBacktracking |
| 752 | The Maze III | Hard | ArrayStringDepth-First Search |
| 753 | The Number of Full Rounds You Have Played | Medium | MathString |
| 754 | The Score of Students Solving Math Expression | Hard | ArrayHash TableMath |
| 755 | The Wording Game | Hard | ArrayMathTwo Pointers |
| 756 | Thousand Separator | Easy | String |
| 757 | Time Based Key-Value Store | Medium | Hash TableStringBinary Search |
| 758 | Time Needed to Rearrange a Binary String | Medium | StringDynamic ProgrammingSimulation |
| 759 | To Lower Case | Easy | String |
| 760 | Top K Frequent Words | Medium | ArrayHash TableString |
| 761 | Total Appeal of A String | Hard | Hash TableStringDynamic Programming |
| 762 | Total Characters in String After Transformations I | Medium | Hash TableMathString |
| 763 | Total Characters in String After Transformations II | Hard | Hash TableMathString |
| 764 | Truncate Sentence | Easy | ArrayString |
| 765 | Tweet Counts Per Frequency | Medium | Hash TableStringBinary Search |
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