| Longest Substring Without Repeating Characters | Medium | 38.5% | 87.5% |
| Longest Palindromic Substring | Medium | 37.3% | 75.0% |
| Text Justification | Hard | 50.4% | 75.0% |
| Minimum Window Substring | Hard | 46.9% | 75.0% |
| Word Search | Medium | 46.8% | 75.0% |
| Restore IP Addresses | Medium | 55.3% | 75.0% |
| Basic Calculator II | Medium | 46.6% | 75.0% |
| Decode String | Medium | 62.2% | 75.0% |
| Valid Parentheses | Easy | 43.7% | 62.5% |
| Generate Parentheses | Medium | 78.2% | 62.5% |
| Group Anagrams | Medium | 72.2% | 62.5% |
| Edit Distance | Medium | 60.1% | 62.5% |
| Word Ladder | Hard | 44.9% | 62.5% |
| Word Break II | Hard | 55.1% | 62.5% |
| Serialize and Deserialize Binary Tree | Hard | 60.3% | 62.5% |
| Longest Substring with At Least K Repeating Characters | Medium | 46.0% | 62.5% |
| Add Strings | Easy | 52.1% | 62.5% |
| Length of the Longest Alphabetical Continuous Substring | Medium | 60.3% | 62.5% |
| Most Popular Video Creator | Medium | 45.2% | 62.5% |
| Valid Parenthesis String | Medium | 39.8% | 62.5% |
| Reorganize String | Medium | 56.8% | 62.5% |
| Longest Happy String | Medium | 65.5% | 62.5% |
| Word Search II | Hard | 38.1% | 62.5% |
| Minimum Operations to Make Character Frequencies Equal | Hard | 26.4% | 62.5% |
| Minimum Cost Good Caption | Hard | 20.5% | 62.5% |
| Lexicographically Smallest Generated String | Hard | 31.5% | 62.5% |
| Regular Expression Matching | Hard | 30.4% | 50.0% |
| Longest Common Prefix | Easy | 47.1% | 50.0% |
| Simplify Path | Medium | 50.0% | 50.0% |
| Word Break | Medium | 49.1% | 50.0% |
| Compare Version Numbers | Medium | 46.1% | 50.0% |
| Basic Calculator | Hard | 46.5% | 50.0% |
| Remove Invalid Parentheses | Hard | 49.8% | 50.0% |
| Remove Duplicate Letters | Medium | 52.8% | 50.0% |
| Evaluate Division | Medium | 64.0% | 50.0% |
| Score of Parentheses | Medium | 63.6% | 50.0% |
| Remove All Adjacent Duplicates in String II | Medium | 60.9% | 50.0% |
| Minimum Remove to Make Valid Parentheses | Medium | 71.3% | 50.0% |
| Find the Length of the Longest Common Prefix | Medium | 57.0% | 50.0% |
| Greatest Common Divisor of Strings | Easy | 53.4% | 50.0% |
| Design Add and Search Words Data Structure | Medium | 48.1% | 50.0% |
| Integer to Roman | Medium | 70.4% | 37.5% |
| Longest Valid Parentheses | Hard | 38.0% | 37.5% |
| Multiply Strings | Medium | 43.5% | 37.5% |
| Decode Ways | Medium | 37.6% | 37.5% |
| Valid Palindrome | Easy | 52.8% | 37.5% |
| Reverse Words in a String | Medium | 55.5% | 37.5% |
| Fraction to Recurring Decimal | Medium | 30.5% | 37.5% |
| Step-By-Step Directions From a Binary Tree Node to Another | Medium | 56.4% | 37.5% |
| Find All Possible Recipes from Given Supplies | Medium | 56.8% | 37.5% |
| Largest Number | Medium | 42.6% | 37.5% |
| Expression Add Operators | Hard | 42.8% | 37.5% |
| Remove K Digits | Medium | 36.4% | 37.5% |
| Longest Repeating Character Replacement | Medium | 59.0% | 37.5% |
| String Compression | Medium | 59.5% | 37.5% |
| Validate IP Address | Medium | 28.2% | 37.5% |
| Split Message Based on Limit | Hard | 42.0% | 37.5% |
| Count Pairs Of Similar Strings | Easy | 73.5% | 37.5% |
| Next Greater Element III | Medium | 35.1% | 37.5% |
| Valid Palindrome II | Easy | 44.0% | 37.5% |
| Stickers to Spell Word | Hard | 50.6% | 37.5% |
| Number of Atoms | Hard | 65.1% | 37.5% |
| Open the Lock | Medium | 61.1% | 37.5% |
| Flip String to Monotone Increasing | Medium | 61.8% | 37.5% |
| Longest Common Subsequence | Medium | 58.9% | 37.5% |
| Reformat Date | Easy | 68.2% | 37.5% |
| Search Suggestions System | Medium | 65.2% | 37.5% |
| Concatenated Words | Hard | 49.7% | 37.5% |
| Permutation in String | Medium | 48.4% | 37.5% |
| Replace Words | Medium | 68.6% | 37.5% |
| Sentence Similarity III | Medium | 48.5% | 37.5% |
| Time Based Key-Value Store | Medium | 49.7% | 37.5% |
| Numbers At Most N Given Digit Set | Hard | 44.5% | 37.5% |
| Letter Case Permutation | Medium | 75.7% | 37.5% |
| Longest Duplicate Substring | Hard | 31.1% | 37.5% |
| Roman to Integer | Easy | 66.2% | 37.5% |
| Distinct Subsequences | Hard | 51.5% | 25.0% |
| Word Ladder II | Hard | 27.5% | 25.0% |
| Isomorphic Strings | Easy | 48.0% | 25.0% |
| Implement Trie (Prefix Tree) | Medium | 69.2% | 25.0% |
| Shortest Palindrome | Hard | 41.8% | 25.0% |
| Valid Anagram | Easy | 67.8% | 25.0% |
| Is Subsequence | Easy | 48.8% | 25.0% |
| Minimum Time Difference | Medium | 62.5% | 25.0% |
| Verifying an Alien Dictionary | Easy | 55.9% | 25.0% |
| Minimum Insertions to Balance a Parentheses String | Medium | 53.5% | 25.0% |
| Letter Combinations of a Phone Number | Medium | 65.5% | 25.0% |
| Sort Characters By Frequency | Medium | 75.1% | 25.0% |
| Minimum Number of Operations to Move All Balls to Each Box | Medium | 90.1% | 25.0% |
| Top K Frequent Words | Medium | 60.0% | 25.0% |
| Lexicographically Smallest Palindrome | Easy | 80.8% | 25.0% |
| Construct String from Binary Tree | Medium | 70.6% | 25.0% |
| Wildcard Matching | Hard | 31.3% | 25.0% |
| Longest String Chain | Medium | 62.8% | 25.0% |
| Count Binary Substrings | Easy | 70.2% | 25.0% |
| Accounts Merge | Medium | 60.9% | 25.0% |
| Robot Bounded In Circle | Medium | 56.4% | 25.0% |
| Find All Anagrams in a String | Medium | 53.3% | 25.0% |