| Longest Substring Without Repeating Characters | Medium | 38.5% | 83.5% |
| String Compression | Medium | 59.6% | 79.2% |
| Valid Palindrome II | Easy | 44.0% | 78.6% |
| One Edit Distance | Medium | 34.6% | 72.9% |
| Permutation in String | Medium | 48.5% | 72.0% |
| Isomorphic Strings | Easy | 48.1% | 72.0% |
| Longest Palindromic Substring | Medium | 37.4% | 70.2% |
| Valid Palindrome | Easy | 52.8% | 70.2% |
| Find All Anagrams in a String | Medium | 53.3% | 69.2% |
| Group Anagrams | Medium | 72.2% | 65.9% |
| Is Subsequence | Easy | 48.9% | 60.4% |
| Valid Parentheses | Easy | 43.7% | 60.4% |
| Reconstruct Itinerary | Hard | 44.3% | 52.7% |
| Longest Substring with At Most K Distinct Characters | Medium | 49.9% | 50.1% |
| Generate Parentheses | Medium | 78.3% | 50.1% |
| Count Substrings Without Repeating Character | Medium | 76.1% | 50.1% |
| Basic Calculator II | Medium | 46.7% | 43.8% |
| Simplify Path | Medium | 50.0% | 43.8% |
| Longest Repeating Character Replacement | Medium | 59.1% | 43.8% |
| Destination City | Easy | 79.5% | 43.8% |
| Minimum Window Substring | Hard | 47.0% | 34.2% |
| Letter Combinations of a Phone Number | Medium | 65.5% | 34.2% |
| Add Strings | Easy | 52.1% | 34.2% |
| Valid Anagram | Easy | 67.8% | 26.7% |
| Longest Substring with At Least K Repeating Characters | Medium | 46.1% | 26.7% |
| First Unique Character in a String | Easy | 65.1% | 26.7% |
| Text Justification | Hard | 50.5% | 26.7% |
| Jewels and Stones | Easy | 89.5% | 26.7% |
| Path Crossing | Easy | 62.6% | 26.7% |
| Add Binary | Easy | 57.7% | 26.7% |
