| 2531 | Make Number of Distinct Characters Equal | Medium |
| 2546 | Apply Bitwise Operations to Make Strings Equal | Medium |
| 2559 | Count Vowel Strings in Ranges | Medium |
| 2564 | Substring XOR Queries | Medium |
| 2565 | Subsequence With the Minimum Score | Hard |
| 2573 | Find the String with LCP | Hard |
| 2575 | Find the Divisibility Array of a String | Medium |
| 2586 | Count the Number of Vowel Strings in Range | Easy |
| 2606 | Find the Substring With Maximum Cost | Medium |
| 2609 | Find the Longest Balanced Substring of a Binary String | Easy |
| 2645 | Minimum Additions to Make Valid String | Medium |
| 2663 | Lexicographically Smallest Beautiful String | Hard |
| 2678 | Number of Senior Citizens | Easy |
| 2696 | Minimum String Length After Removing Substrings | Easy |
| 2697 | Lexicographically Smallest Palindrome | Easy |
| 2707 | Extra Characters in a String | Medium |
| 2710 | Remove Trailing Zeros From a String | Easy |
| 2712 | Minimum Cost to Make All Characters Equal | Medium |
| 2716 | Minimize String Length | Easy |
| 2719 | Count of Integers | Hard |
| 2730 | Find the Longest Semi-Repetitive Substring | Medium |
| 2734 | Lexicographically Smallest String After Substring Operation | Medium |
| 2744 | Find Maximum Number of String Pairs | Easy |
| 2746 | Decremental String Concatenation | Medium |
| 2767 | Partition String Into Minimum Beautiful Substrings | Medium |
| 2781 | Length of the Longest Valid Substring | Hard |
| 2785 | Sort Vowels in a String | Medium |
| 2788 | Split Strings by Separator | Easy |
| 2800 | Shortest String That Contains Three Strings | Medium |
| 2801 | Count Stepping Numbers in Range | Hard |