| Separate Black and White Balls | Medium | 64.0% |
| String Compression | Medium | 59.6% |
| Smallest Divisible Digit Product II | Hard | 14.4% |
| Longest Substring Without Repeating Characters | Medium | 38.5% |
| Longest Palindromic Substring | Medium | 37.4% |
| Letter Combinations of a Phone Number | Medium | 65.5% |
| Shortest Palindrome | Hard | 41.9% |
| Roman to Integer | Easy | 66.3% |
| Largest Number | Medium | 42.6% |
| Longest Common Prefix | Easy | 47.1% |
| Reverse Words in a String | Medium | 55.6% |
| Valid Parentheses | Easy | 43.7% |
| Valid Anagram | Easy | 67.8% |
| Permutation Difference between Two Strings | Easy | 87.8% |
| Sort Characters By Frequency | Medium | 75.1% |
| Valid Palindrome | Easy | 52.8% |
| Edit Distance | Medium | 60.2% |
| Generate Parentheses | Medium | 78.3% |
| Integer to Roman | Medium | 70.5% |
| String to Integer (atoi) | Medium | 20.6% |
| Longest Common Subsequence | Medium | 58.9% |
| Regular Expression Matching | Hard | 30.5% |
| Find All Anagrams in a String | Medium | 53.3% |
| Find the Difference | Easy | 60.1% |
| Minimum Insertion Steps to Make a String Palindrome | Hard | 73.7% |
| Reverse String | Easy | 80.6% |
| Longest Palindrome | Easy | 55.8% |
| Largest Odd Number in String | Easy | 67.0% |
| Palindrome Partitioning | Medium | 73.7% |
| Reverse String II | Easy | 53.4% |
| Remove K Digits | Medium | 36.4% |
| First Unique Character in a String | Easy | 65.1% |
| Word Search | Medium | 46.9% |
| Longest Palindromic Subsequence | Medium | 65.1% |
| Rotate String | Easy | 65.1% |
| Longest Valid Parentheses | Hard | 38.1% |
| Final Value of Variable After Performing Operations | Easy | 90.6% |
| Replace the Substring for Balanced String | Medium | 40.6% |
| Group Anagrams | Medium | 72.2% |
| Decode String | Medium | 62.3% |
| Reformat Phone Number | Easy | 67.6% |
| Is Subsequence | Easy | 48.9% |
| Basic Calculator II | Medium | 46.7% |
| Special Binary String | Hard | 79.3% |
| Minimum Window Substring | Hard | 47.0% |
| Validate IP Address | Medium | 28.2% |
| Top K Frequent Words | Medium | 60.0% |
| Restore IP Addresses | Medium | 55.3% |
| Count Pairs Of Similar Strings | Easy | 73.6% |
| Word Ladder | Hard | 44.9% |
| Longest Repeating Character Replacement | Medium | 59.1% |
| Next Greater Element III | Medium | 35.2% |
| Permutation in String | Medium | 48.5% |
| Reverse Substrings Between Each Pair of Parentheses | Medium | 71.9% |
| Search Suggestions System | Medium | 65.1% |
| Plates Between Candles | Medium | 47.3% |
| Decode Ways | Medium | 37.6% |
| Add Binary | Easy | 57.7% |
| Reformat Date | Easy | 68.3% |
| Minimum Number of Swaps to Make the String Balanced | Medium | 78.1% |
| Basic Calculator | Hard | 46.6% |
| Reconstruct Itinerary | Hard | 44.3% |
| Check If Digits Are Equal in String After Operations II | Hard | 14.2% |
| Parsing A Boolean Expression | Hard | 69.8% |
| Shortest Uncommon Substring in an Array | Medium | 50.0% |
| Parse Lisp Expression | Hard | 53.5% |
| Number of Atoms | Hard | 65.1% |
| Remove All Adjacent Duplicates in String II | Medium | 60.9% |
| Backspace String Compare | Easy | 49.8% |
| Lexicographically Smallest String After Substring Operation | Medium | 34.5% |
| Fizz Buzz | Easy | 75.3% |
| Longest String Chain | Medium | 62.8% |
| Reorganize String | Medium | 56.8% |
| Design Excel Sum Formula | Hard | 39.9% |
| Accounts Merge | Medium | 60.9% |
| Smallest Common Region | Medium | 68.3% |
| Text Justification | Hard | 50.5% |
| Palindrome Pairs | Hard | 37.0% |
| Alien Dictionary | Hard | 37.1% |
| IP to CIDR | Medium | 53.6% |
| Word Search II | Hard | 38.1% |
| Mini Parser | Medium | 42.0% |
| Minimize Rounding Error to Meet Target | Medium | 45.8% |
| Add Strings | Easy | 52.1% |
| Strings Differ by One Character | Medium | 40.1% |
| Robot Bounded In Circle | Medium | 56.5% |
| Design File System | Medium | 65.1% |
| Pyramid Transition Matrix | Medium | 60.6% |
| Time Based Key-Value Store | Medium | 49.7% |
| Minimum Window Subsequence | Hard | 43.8% |
| Palindromic Substrings | Medium | 72.6% |
| Can Make Palindrome from Substring | Medium | 41.3% |
| Increasing Decreasing String | Easy | 77.2% |
| Map Sum Pairs | Medium | 57.1% |
| Split Concatenated Strings | Medium | 43.6% |
| Valid Parenthesis String | Medium | 39.8% |
| Maximum Number of Removable Characters | Medium | 46.9% |
| Open the Lock | Medium | 61.2% |
| Interleaving String | Medium | 43.5% |
| Palindrome Partitioning II | Hard | 36.6% |