| Longest Substring Without Repeating Characters | Medium | 38.5% | 87.8% |
| Text Justification | Hard | 50.5% | 79.6% |
| Decode String | Medium | 62.3% | 77.7% |
| Word Search | Medium | 46.9% | 76.8% |
| Longest Palindromic Substring | Medium | 37.4% | 74.6% |
| Minimum Window Substring | Hard | 47.0% | 74.6% |
| Longest Happy String | Medium | 65.5% | 66.6% |
| Valid Parentheses | Easy | 43.7% | 66.6% |
| Basic Calculator II | Medium | 46.7% | 66.6% |
| Basic Calculator III | Hard | 53.2% | 66.6% |
| Word Ladder | Hard | 44.9% | 65.0% |
| Generate Parentheses | Medium | 78.3% | 63.2% |
| Valid Parenthesis String | Medium | 39.8% | 63.2% |
| Word Search II | Hard | 38.1% | 61.2% |
| Add Strings | Easy | 52.1% | 61.2% |
| Serialize and Deserialize Binary Tree | Hard | 60.4% | 59.1% |
| Minimum Operations to Make Character Frequencies Equal | Hard | 26.4% | 59.1% |
| Minimum Cost Good Caption | Hard | 20.5% | 59.1% |
| Lexicographically Smallest Generated String | Hard | 31.5% | 59.1% |
| Edit Distance | Medium | 60.2% | 59.1% |
| Word Break II | Hard | 55.1% | 59.1% |
| Most Popular Video Creator | Medium | 45.2% | 59.1% |
| Length of the Longest Alphabetical Continuous Substring | Medium | 60.3% | 59.1% |
| Basic Calculator | Hard | 46.6% | 56.7% |
| Simplify Path | Medium | 50.0% | 56.7% |
| Group Anagrams | Medium | 72.2% | 54.1% |
| Longest Substring with At Least K Repeating Characters | Medium | 46.1% | 54.1% |
| Design Add and Search Words Data Structure | Medium | 48.2% | 54.1% |
| Word Break | Medium | 49.1% | 54.1% |
| Regular Expression Matching | Hard | 30.5% | 51.2% |
| Longest Common Prefix | Easy | 47.1% | 51.2% |
| Alien Dictionary | Hard | 37.1% | 51.2% |
| Evaluate Division | Medium | 64.0% | 51.2% |
| Greatest Common Divisor of Strings | Easy | 53.4% | 51.2% |
| Remove Duplicate Letters | Medium | 52.8% | 51.2% |
| Restore IP Addresses | Medium | 55.3% | 51.2% |
| Minimum Remove to Make Valid Parentheses | Medium | 71.3% | 51.2% |
| Longest Valid Parentheses | Hard | 38.1% | 47.7% |
| Multiply Strings | Medium | 43.6% | 47.7% |
| Compare Version Numbers | Medium | 46.1% | 47.7% |
| Design In-Memory File System | Hard | 48.4% | 47.7% |
| Find the Length of the Longest Common Prefix | Medium | 57.0% | 47.7% |
| Split Message Based on Limit | Hard | 42.0% | 43.7% |
| Reorganize String | Medium | 56.8% | 43.7% |
| Score of Parentheses | Medium | 63.6% | 43.7% |
| Remove All Adjacent Duplicates in String II | Medium | 60.9% | 43.7% |
| Open the Lock | Medium | 61.2% | 43.7% |
| Numbers At Most N Given Digit Set | Hard | 44.6% | 43.7% |
| Remove Invalid Parentheses | Hard | 49.8% | 43.7% |
| Find All Possible Recipes from Given Supplies | Medium | 56.8% | 38.8% |
| Design Search Autocomplete System | Hard | 49.7% | 38.8% |
| Stickers to Spell Word | Hard | 50.6% | 38.8% |
| Sentence Similarity III | Medium | 48.5% | 38.8% |
| Integer to Roman | Medium | 70.5% | 38.8% |
| Longest Substring with At Most K Distinct Characters | Medium | 49.9% | 38.8% |
| Remove K Digits | Medium | 36.4% | 38.8% |
| Longest Common Subsequence | Medium | 58.9% | 38.8% |
| Serialize and Deserialize N-ary Tree | Hard | 68.6% | 32.6% |
| Find All Anagrams in a String | Medium | 53.3% | 32.6% |
| Valid Palindrome | Easy | 52.8% | 32.6% |
| Reverse Words in a String | Medium | 55.6% | 32.6% |
| Step-By-Step Directions From a Binary Tree Node to Another | Medium | 56.4% | 32.6% |
| String Compression | Medium | 59.6% | 32.6% |
| Valid Palindrome II | Easy | 44.0% | 32.6% |
| Search Suggestions System | Medium | 65.1% | 32.6% |
| Longest Substring with At Most Two Distinct Characters | Medium | 57.0% | 32.6% |
| Count Pairs Of Similar Strings | Easy | 73.6% | 32.6% |
| Concatenated Words | Hard | 49.7% | 32.6% |
| Permutation in String | Medium | 48.5% | 32.6% |
| Replace Words | Medium | 68.6% | 32.6% |
| Time Based Key-Value Store | Medium | 49.7% | 32.6% |
| Letter Case Permutation | Medium | 75.7% | 32.6% |
| Largest Number | Medium | 42.6% | 32.6% |
| Add Bold Tag in String | Medium | 51.4% | 32.6% |
| Roman to Integer | Easy | 66.3% | 32.6% |
| Longest Duplicate Substring | Hard | 31.1% | 32.6% |
| Number of Atoms | Hard | 65.1% | 32.6% |
| Accounts Merge | Medium | 60.9% | 32.6% |
| Robot Bounded In Circle | Medium | 56.5% | 24.3% |
| Decode Ways | Medium | 37.6% | 24.3% |
| Expression Add Operators | Hard | 42.8% | 24.3% |
| Validate IP Address | Medium | 28.2% | 24.3% |
| Rearrange String k Distance Apart | Hard | 39.9% | 24.3% |
| Valid Word Abbreviation | Easy | 37.0% | 24.3% |
| Minimum Number of Operations to Move All Balls to Each Box | Medium | 90.1% | 24.3% |
| Top K Frequent Words | Medium | 60.0% | 24.3% |
| Valid Palindrome III | Hard | 49.1% | 24.3% |
| Construct String from Binary Tree | Medium | 70.6% | 24.3% |
| Encode and Decode Strings | Medium | 51.2% | 24.3% |
| Implement Trie (Prefix Tree) | Medium | 69.2% | 24.3% |
| Count Binary Substrings | Easy | 70.3% | 24.3% |
| Word Pattern II | Medium | 48.8% | 24.3% |
