| First Unique Character in a String | Easy | 65.1% | 78.0% |
| Fraction to Recurring Decimal | Medium | 30.6% | 77.1% |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 63.6% |
| String Compression | Medium | 59.6% | 62.2% |
| Robot Bounded In Circle | Medium | 56.5% | 59.9% |
| Group Anagrams | Medium | 72.2% | 58.2% |
| Decode Ways | Medium | 37.6% | 58.2% |
| Better Compression of String | Medium | 75.3% | 55.2% |
| Robot Return to Origin | Easy | 76.5% | 51.6% |
| Minimum Length of String After Deleting Similar Ends | Medium | 56.1% | 50.3% |
| Count Palindromic Subsequences | Hard | 41.0% | 47.1% |
| Perform String Shifts | Easy | 56.0% | 47.1% |
| Minimum Number of Chairs in a Waiting Room | Easy | 79.2% | 47.1% |
| Maximize Palindrome Length From Subsequences | Hard | 38.2% | 47.1% |
| Determine if Two Events Have Conflict | Easy | 53.1% | 47.1% |
| Count Number of Texts | Medium | 49.9% | 47.1% |
| Remove All Adjacent Duplicates in String II | Medium | 60.9% | 45.3% |
| Construct Smallest Number From DI String | Medium | 85.6% | 43.3% |
| Palindromic Substrings | Medium | 72.6% | 43.3% |
| Backspace String Compare | Easy | 49.8% | 43.3% |
| Longest Repeating Character Replacement | Medium | 59.1% | 43.3% |
| Check if the Sentence Is Pangram | Easy | 84.1% | 41.0% |
| Integer to English Words | Hard | 34.8% | 41.0% |
| Longest Palindromic Substring | Medium | 37.4% | 41.0% |
| String to Integer (atoi) | Medium | 20.6% | 38.4% |
| Valid Parentheses | Easy | 43.7% | 38.4% |
| Generate Parentheses | Medium | 78.3% | 38.4% |
| Open the Lock | Medium | 61.2% | 38.4% |
| Consecutive Characters | Easy | 60.3% | 38.4% |
| Roman to Integer | Easy | 66.3% | 35.3% |
| Minimum Window Substring | Hard | 47.0% | 31.5% |
| Letter Combinations of a Phone Number | Medium | 65.5% | 26.7% |
| Word Search | Medium | 46.9% | 26.7% |
| Decode String | Medium | 62.3% | 26.7% |
| Design Underground System | Medium | 74.4% | 26.7% |
| Find the Closest Palindrome | Hard | 31.8% | 26.7% |
| Palindrome Pairs | Hard | 37.0% | 26.7% |
| Reverse String | Easy | 80.6% | 26.7% |
| Minimum Number of Moves to Make Palindrome | Hard | 52.6% | 26.7% |
| Valid Parenthesis String | Medium | 39.8% | 26.7% |
| Count of Integers | Hard | 38.2% | 20.2% |
| Integer to Roman | Medium | 70.5% | 20.2% |
| Word Break | Medium | 49.1% | 20.2% |
| Basic Calculator II | Medium | 46.7% | 20.2% |
| Restore IP Addresses | Medium | 55.3% | 20.2% |
| Excel Sheet Column Number | Easy | 67.3% | 20.2% |
| Remove All Occurrences of a Substring | Medium | 78.4% | 20.2% |
| Isomorphic Strings | Easy | 48.1% | 20.2% |
| Lexicographically Smallest String After Substring Operation | Medium | 34.5% | 20.2% |
| Fizz Buzz | Easy | 75.3% | 20.2% |
| Text Justification | Hard | 50.5% | 20.2% |
| Reorganize String | Medium | 56.8% | 20.2% |
| Longest Palindromic Subsequence | Medium | 65.1% | 20.2% |
| Word Ladder | Hard | 44.9% | 20.2% |
| Longest Duplicate Substring | Hard | 31.1% | 20.2% |
| Parsing A Boolean Expression | Hard | 69.8% | 20.2% |
| Minimum Swaps to Make Strings Equal | Medium | 65.3% | 20.2% |
| Evaluate Division | Medium | 64.0% | 20.2% |
| Reverse Words in a String | Medium | 55.6% | 20.2% |
| Largest Number | Medium | 42.6% | 20.2% |
| Longest Substring with At Most K Distinct Characters | Medium | 49.9% | 20.2% |
| Implement Trie (Prefix Tree) | Medium | 69.2% | 20.2% |
| Find the Longest Substring Containing Vowels in Even Counts | Medium | 75.7% | 20.2% |
| Minimum Insertion Steps to Make a String Palindrome | Hard | 73.7% | 20.2% |
| Valid Anagram | Easy | 67.8% | 20.2% |
| Top K Frequent Words | Medium | 60.0% | 20.2% |
| Is Subsequence | Easy | 48.9% | 20.2% |
| Accounts Merge | Medium | 60.9% | 20.2% |
