| Two Sum | Easy | 57.1% | 100.0% | ArrayHash Table |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 100.0% | Hash TableStringSliding Window |
| Valid Parentheses | Easy | 43.7% | 100.0% | StringStack |
| Minimum Operations to Make a Uni-Value Grid | Medium | 67.5% | 100.0% | ArrayMathSorting+1 |
| Longest Palindromic Substring | Medium | 37.3% | 87.5% | Two PointersStringDynamic Programming |
| Group Anagrams | Medium | 72.2% | 87.5% | ArrayHash TableString+1 |
| Best Time to Buy and Sell Stock | Easy | 56.4% | 87.5% | ArrayDynamic Programming |
| Longest Common Prefix | Easy | 47.1% | 87.5% | ArrayStringTrie |
| Merge Sorted Array | Easy | 54.4% | 75.0% | ArrayTwo PointersSorting |
| Valid Anagram | Easy | 67.8% | 75.0% | Hash TableStringSorting |
| Rotate Array | Medium | 44.4% | 75.0% | ArrayMathTwo Pointers |
| Reverse String | Easy | 80.5% | 75.0% | Two PointersString |
| Move Zeroes | Easy | 63.5% | 75.0% | ArrayTwo Pointers |
| Palindrome Number | Easy | 60.2% | 62.5% | Math |
| Trapping Rain Water | Hard | 66.8% | 62.5% | ArrayTwo PointersDynamic Programming+2 |
| House Robber | Medium | 52.9% | 62.5% | ArrayDynamic Programming |
| Partition Equal Subset Sum | Medium | 49.2% | 62.5% | ArrayDynamic Programming |
| Maximum Difference Between Node and Ancestor | Medium | 78.1% | 62.5% | TreeDepth-First SearchBinary Tree |
| Reverse Integer | Medium | 31.5% | 62.5% | Math |
| Longest Consecutive Sequence | Medium | 47.0% | 62.5% | ArrayHash TableUnion-Find |
| String Compression | Medium | 59.5% | 62.5% | Two PointersString |
| First Unique Character in a String | Easy | 65.0% | 62.5% | Hash TableStringQueue+1 |
| Two Sum II - Input Array Is Sorted | Medium | 64.6% | 62.5% | ArrayTwo PointersBinary Search |
| Pow(x, n) | Medium | 38.2% | 62.5% | MathRecursion |
| Merge Intervals | Medium | 51.1% | 62.5% | ArraySorting |
| Reverse Vowels of a String | Easy | 60.6% | 62.5% | Two PointersString |
| Multiply Strings | Medium | 43.5% | 62.5% | MathStringSimulation |
| Add Two Numbers | Medium | 47.9% | 50.0% | Linked ListMathRecursion |
| 3Sum | Medium | 38.6% | 50.0% | ArrayTwo PointersSorting |
| Valid Palindrome | Easy | 52.8% | 50.0% | Two PointersString |
| Asteroid Collision | Medium | 47.1% | 50.0% | ArrayStackSimulation |
| Coin Change | Medium | 47.9% | 50.0% | ArrayDynamic ProgrammingBreadth-First Search |
| Binary Search | Easy | 60.5% | 50.0% | ArrayBinary Search |
| Reverse Linked List II | Medium | 51.0% | 50.0% | Linked List |
| Running Sum of 1d Array | Easy | 86.9% | 50.0% | ArrayPrefix Sum |
| Duplicate Emails | Easy | 73.4% | 50.0% | Database |
| Search in Rotated Sorted Array | Medium | 44.1% | 50.0% | ArrayBinary Search |
| Generate Parentheses | Medium | 78.2% | 50.0% | StringDynamic ProgrammingBacktracking |
| Count Salary Categories | Medium | 64.0% | 50.0% | Database |
| Remove Duplicates from Sorted Array | Easy | 62.2% | 50.0% | ArrayTwo Pointers |
| Maximum Subarray | Medium | 53.0% | 50.0% | ArrayDivide and ConquerDynamic Programming |
| Reverse Words in a String | Medium | 55.5% | 50.0% | Two PointersString |
| Unique Paths | Medium | 66.5% | 50.0% | MathDynamic ProgrammingCombinatorics |
| Edit Distance | Medium | 60.1% | 50.0% | StringDynamic Programming |
| Roman to Integer | Easy | 66.2% | 50.0% | Hash TableMathString |
| Counter | Easy | 82.4% | 50.0% | |
| Reverse Linked List | Easy | 80.2% | 50.0% | Linked ListRecursion |
| Sort Characters By Frequency | Medium | 75.1% | 50.0% | Hash TableStringSorting+3 |
| Top K Frequent Elements | Medium | 65.8% | 50.0% | ArrayHash TableDivide and Conquer+5 |
| Kth Largest Element in an Array | Medium | 68.8% | 50.0% | ArrayDivide and ConquerSorting+2 |
| First Missing Positive | Hard | 42.4% | 50.0% | ArrayHash Table |