Practice problems across 75+ categories
Practice problems frequently asked at String • 803 problems | 228 Easy | 390 Medium | 177 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 691 | Smallest String With Swaps | Medium | ArrayHash TableString |
| 692 | Smallest Subsequence of Distinct Characters | Medium | StringStackGreedy |
| 693 | Smallest Substring With Identical Characters II | Hard | StringBinary Search |
| 694 | Snake in Matrix | Easy | ArrayStringSimulation |
| 695 | Solve the Equation | Medium | MathStringSimulation |
| 696 | Sort Characters By Frequency | Medium | Hash TableStringSorting |
| 697 | Sort Features by Popularity | Medium | ArrayHash TableString |
| 698 | Sort the People | Easy | ArrayHash TableString |
| 699 | Sort Vowels in a String | Medium | StringSorting |
| 700 | Sorting the Sentence | Easy | StringSorting |
| 701 | Special Binary String | Hard | StringRecursion |
| 702 | Split a String in Balanced Strings | Easy | StringGreedyCounting |
| 703 | Split a String Into the Max Number of Unique Substrings | Medium | Hash TableStringBacktracking |
| 704 | Split Array into Fibonacci Sequence | Medium | StringBacktracking |
| 705 | Split Concatenated Strings | Medium | ArrayStringGreedy |
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