| Merge Intervals | Medium | 51.2% | 100.0% | ArraySorting |
| Remove All Adjacent Duplicates In String | Easy | 72.8% | 91.1% | StringStack |
| Search in Rotated Sorted Array | Medium | 44.1% | 89.8% | ArrayBinary Search |
| Vowel Spellchecker | Medium | 61.4% | 88.5% | ArrayHash TableString |
| Insert Delete GetRandom O(1) | Medium | 55.3% | 88.5% | ArrayHash TableMath+2 |
| Remove All Adjacent Duplicates in String II | Medium | 60.9% | 87.0% | StringStack |
| Climbing Stairs | Easy | 53.9% | 83.8% | MathDynamic ProgrammingMemoization |
| Repeated DNA Sequences | Medium | 52.9% | 80.0% | Hash TableStringBit Manipulation+3 |
| Sqrt(x) | Easy | 41.4% | 77.8% | MathBinary Search |
| Generate Parentheses | Medium | 78.3% | 75.3% | StringDynamic ProgrammingBacktracking |
| Perfect Number | Easy | 48.0% | 72.5% | Math |
| Logger Rate Limiter | Easy | 76.8% | 72.5% | Hash TableDesignData Stream |
| Sum of Left Leaves | Easy | 62.4% | 72.5% | TreeDepth-First SearchBreadth-First Search+1 |
| Non-overlapping Intervals | Medium | 56.7% | 65.5% | ArrayDynamic ProgrammingGreedy+1 |
| Search Insert Position | Easy | 50.7% | 65.5% | ArrayBinary Search |
| Two Best Non-Overlapping Events | Medium | 64.0% | 60.8% | ArrayBinary SearchDynamic Programming+2 |
| Evaluate Reverse Polish Notation | Medium | 57.1% | 60.8% | ArrayMathStack |
| Minimum Substring Partition of Equal Character Frequency | Medium | 40.0% | 54.8% | Hash TableStringDynamic Programming+1 |
| Word Search | Medium | 46.9% | 54.8% | ArrayStringBacktracking+2 |
| Implement Trie (Prefix Tree) | Medium | 69.2% | 54.8% | Hash TableStringDesign+1 |
| Check If a String Contains All Binary Codes of Size K | Medium | 61.5% | 54.8% | Hash TableStringBit Manipulation+2 |
| Word Break II | Hard | 55.1% | 54.8% | ArrayHash TableString+4 |
| Recover a Tree From Preorder Traversal | Hard | 83.2% | 46.4% | StringTreeDepth-First Search+1 |
| Number of Islands | Medium | 63.8% | 46.4% | ArrayDepth-First SearchBreadth-First Search+2 |
| Special Binary String | Hard | 79.3% | 46.4% | StringDivide and ConquerSorting |
| Decode the Slanted Ciphertext | Medium | 50.3% | 46.4% | StringSimulation |
| Maximum Palindromes After Operations | Medium | 45.6% | 46.4% | ArrayHash TableString+3 |
| Trapping Rain Water | Hard | 66.8% | 46.4% | ArrayTwo PointersDynamic Programming+2 |
| Unique Paths | Medium | 66.6% | 46.4% | MathDynamic ProgrammingCombinatorics |
| Word Break | Medium | 49.1% | 46.4% | ArrayHash TableString+3 |