| Two Sum | Easy | 57.1% | 100.0% | ArrayHash Table |
| Number of Unique Subjects Taught by Each Teacher | Easy | 89.2% | 87.5% | Database |
| Reverse Degree of a String | Easy | 88.5% | 87.5% | StringSimulation |
| Count Elements With Maximum Frequency | Easy | 79.8% | 75.0% | ArrayHash TableCounting |
| Palindrome Number | Easy | 60.2% | 62.5% | Math |
| Remove Duplicates from Sorted Array | Easy | 62.2% | 62.5% | ArrayTwo Pointers |
| Best Time to Buy and Sell Stock | Easy | 56.4% | 62.5% | ArrayDynamic Programming |
| Rotate Array | Medium | 44.4% | 62.5% | ArrayMathTwo Pointers |
| Longest Common Prefix | Easy | 47.1% | 62.5% | ArrayStringTrie |
| Median of Two Sorted Arrays | Hard | 45.9% | 62.5% | ArrayBinary SearchDivide and Conquer |
| Exchange Seats | Medium | 73.8% | 62.5% | Database |
| Valid Anagram | Easy | 67.8% | 62.5% | Hash TableStringSorting |
| Move Zeroes | Easy | 63.5% | 62.5% | ArrayTwo Pointers |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 62.5% | Hash TableStringSliding Window |
| Find First and Last Position of Element in Sorted Array | Medium | 48.3% | 62.5% | ArrayBinary Search |
| Merge Two Sorted Lists | Easy | 67.9% | 62.5% | Linked ListRecursion |
| Find the Index of the First Occurrence in a String | Easy | 46.2% | 62.5% | Two PointersStringString Matching |
| Contains Duplicate | Easy | 64.1% | 62.5% | ArrayHash TableSorting |
| Group Anagrams | Medium | 72.2% | 62.5% | ArrayHash TableString+1 |
| Add Two Numbers | Medium | 47.9% | 50.0% | Linked ListMathRecursion |
| Longest Happy String | Medium | 65.5% | 50.0% | StringGreedyHeap (Priority Queue) |
| Trapping Rain Water | Hard | 66.8% | 50.0% | ArrayTwo PointersDynamic Programming+2 |
| Balanced Binary Tree | Easy | 57.8% | 50.0% | TreeDepth-First SearchBinary Tree |
| Subarray Sum Equals K | Medium | 46.8% | 50.0% | ArrayHash TablePrefix Sum |
| Coin Change | Medium | 47.9% | 50.0% | ArrayDynamic ProgrammingBreadth-First Search |
| Sort Colors | Medium | 69.1% | 50.0% | ArrayTwo PointersSorting |
| Longest Consecutive Sequence | Medium | 47.0% | 50.0% | ArrayHash TableUnion-Find |
| Reverse Integer | Medium | 31.5% | 50.0% | Math |
| Container With Most Water | Medium | 59.5% | 50.0% | ArrayTwo PointersGreedy |
| Roman to Integer | Easy | 66.2% | 50.0% | Hash TableMathString |
| Second Highest Salary | Medium | 46.3% | 50.0% | Database |
| Chunk Array | Easy | 84.7% | 50.0% | |
| Plus One | Easy | 49.5% | 50.0% | ArrayMath |
| Minimize Maximum Pair Sum in Array | Medium | 83.3% | 50.0% | ArrayTwo PointersGreedy+1 |
| Lowest Common Ancestor of a Binary Search Tree | Medium | 70.0% | 50.0% | TreeDepth-First SearchBinary Search Tree+1 |
| Intersection of Two Arrays | Easy | 77.5% | 50.0% | ArrayHash TableTwo Pointers+2 |