| Two Sum | Easy | 57.1% | 100.0% | ArrayHash Table |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 100.0% | Hash TableStringSliding Window |
| Longest Common Prefix | Easy | 47.1% | 100.0% | ArrayStringTrie |
| Group Anagrams | Medium | 72.2% | 100.0% | ArrayHash TableString+1 |
| Merge Intervals | Medium | 51.1% | 100.0% | ArraySorting |
| Word Ladder II | Hard | 27.5% | 100.0% | Hash TableStringBacktracking+1 |
| Word Ladder | Hard | 44.9% | 100.0% | Hash TableStringBreadth-First Search |
| Reverse Words in a String | Medium | 55.5% | 100.0% | Two PointersString |
| Active Businesses | Medium | 66.0% | 100.0% | |
| Reverse Linked List | Easy | 80.3% | 100.0% | Linked ListRecursion |
| Course Schedule | Medium | 50.8% | 100.0% | Depth-First SearchBreadth-First SearchGraph Theory+1 |
| The Skyline Problem | Hard | 45.0% | 100.0% | ArrayDivide and ConquerBinary Indexed Tree+5 |
| Valid Anagram | Easy | 67.8% | 100.0% | Hash TableStringSorting |
| Top K Frequent Elements | Medium | 65.8% | 100.0% | ArrayHash TableDivide and Conquer+5 |
| Insert Delete GetRandom O(1) | Medium | 55.3% | 100.0% | ArrayHash TableMath+2 |
| Insert Delete GetRandom O(1) - Duplicates allowed | Hard | 36.4% | 100.0% | ArrayHash TableMath+2 |
| Decode String | Medium | 62.2% | 100.0% | StringStackRecursion |
| Filter Restaurants by Vegan-Friendly, Price and Distance | Medium | 64.1% | 100.0% | ArraySorting |
| String Compression | Medium | 59.5% | 100.0% | Two PointersString |
| Destination City | Easy | 79.5% | 100.0% | ArrayHash TableString |
| Check If a Word Occurs As a Prefix of Any Word in a Sentence | Easy | 68.8% | 100.0% | Two PointersStringString Matching |
| Find the Closest Palindrome | Hard | 31.8% | 100.0% | MathString |
| Minimum Index Sum of Two Lists | Easy | 59.4% | 100.0% | ArrayHash TableString |
| Top K Frequent Words | Medium | 60.0% | 100.0% | ArrayHash TableString+5 |
| Letter Case Permutation | Medium | 75.7% | 100.0% | StringBacktrackingBit Manipulation |
| Remove Colored Pieces if Both Neighbors are the Same Color | Medium | 63.0% | 100.0% | MathStringGreedy+1 |
| Shortest and Lexicographically Smallest Beautiful String | Medium | 40.8% | 50.0% | StringSliding Window |