| Longest Palindromic Substring | Medium | 37.3% | 100.0% | Two PointersStringDynamic Programming |
| House Robber | Medium | 52.9% | 100.0% | ArrayDynamic Programming |
| Collect Coins in a Tree | Hard | 39.6% | 100.0% | ArrayTreeGraph Theory+1 |
| Rotate Image | Medium | 79.3% | 87.5% | ArrayMathMatrix |
| Spiral Matrix | Medium | 56.1% | 87.5% | ArrayMatrixSimulation |
| Lucky Numbers in a Matrix | Easy | 80.0% | 87.5% | ArrayMatrix |
| Number of Valid Words in a Sentence | Easy | 31.0% | 75.0% | String |
| LRU Cache | Medium | 46.8% | 75.0% | Hash TableLinked ListDesign+1 |
| Sum of k-Mirror Numbers | Hard | 63.7% | 75.0% | MathEnumeration |
| Word Search II | Hard | 38.1% | 75.0% | ArrayStringBacktracking+2 |
| Fizz Buzz | Easy | 75.2% | 75.0% | MathStringSimulation |
| Find Third Transaction | Medium | 53.6% | 75.0% | |
| Implement Router | Medium | 39.2% | 75.0% | ArrayHash TableBinary Search+3 |
| Add Two Numbers | Medium | 47.9% | 62.5% | Linked ListMathRecursion |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 62.5% | Hash TableStringSliding Window |
| Valid Parentheses | Easy | 43.7% | 62.5% | StringStack |
| Maximum Subarray | Medium | 53.0% | 62.5% | ArrayDivide and ConquerDynamic Programming |
| Merge Intervals | Medium | 51.1% | 62.5% | ArraySorting |
| Maximum Difference Between Increasing Elements | Easy | 66.4% | 62.5% | Array |
| Linked List Cycle | Easy | 53.9% | 62.5% | Hash TableLinked ListTwo Pointers |
| Number of Equal Count Substrings | Medium | 45.2% | 62.5% | |
| Find the Largest Area of Square Inside Two Rectangles | Medium | 66.9% | 62.5% | ArrayMathGeometry |
| Minimum Cost to Make Array Equal | Hard | 46.7% | 62.5% | ArrayBinary SearchGreedy+2 |
| Check if Binary String Has at Most One Segment of Ones | Easy | 39.4% | 62.5% | String |
| Edit Distance | Medium | 60.1% | 62.5% | StringDynamic Programming |
| Minimum Time to Collect All Apples in a Tree | Medium | 63.5% | 62.5% | Hash TableTreeDepth-First Search+1 |
| Power Grid Maintenance | Medium | 56.3% | 62.5% | ArrayHash TableDepth-First Search+5 |
| Diagonal Traverse | Medium | 67.0% | 62.5% | ArrayMatrixSimulation |
| Minimum Sensors to Cover Grid | Medium | 68.7% | 62.5% | Math |
| Trapping Rain Water | Hard | 66.8% | 50.0% | ArrayTwo PointersDynamic Programming+2 |
| Best Time to Buy and Sell Stock | Easy | 56.4% | 50.0% | ArrayDynamic Programming |
| Max Points on a Line | Hard | 30.2% | 50.0% | ArrayHash TableMath+1 |
| Number of Islands | Medium | 63.8% | 50.0% | ArrayDepth-First SearchBreadth-First Search+2 |
| Happy Number | Easy | 59.2% | 50.0% | Hash TableMathTwo Pointers |
| Decode String | Medium | 62.2% | 50.0% | StringStackRecursion |
| Group Anagrams | Medium | 72.2% | 50.0% | ArrayHash TableString+1 |
| Longest Consecutive Sequence | Medium | 47.0% | 50.0% | ArrayHash TableUnion-Find |
| Remove Duplicates from Sorted Array | Easy | 62.2% | 50.0% | ArrayTwo Pointers |
| Two Sum | Easy | 57.1% | 37.5% | ArrayHash Table |
| 3Sum | Medium | 38.6% | 37.5% | ArrayTwo PointersSorting |
| Merge k Sorted Lists | Hard | 58.8% | 37.5% | Linked ListDivide and ConquerHeap (Priority Queue)+1 |
| Merge Sorted Array | Easy | 54.4% | 37.5% | ArrayTwo PointersSorting |
| Gas Station | Medium | 47.5% | 37.5% | ArrayGreedy |
| Reverse Linked List | Easy | 80.2% | 37.5% | Linked ListRecursion |
| Product of Array Except Self | Medium | 68.6% | 37.5% | ArrayPrefix Sum |
| Move Zeroes | Easy | 63.5% | 37.5% | ArrayTwo Pointers |
| Insert Delete GetRandom O(1) | Medium | 55.3% | 37.5% | ArrayHash TableMath+2 |
| Validate IP Address | Medium | 28.2% | 37.5% | String |
| Palindromic Substrings | Medium | 72.5% | 37.5% | Two PointersStringDynamic Programming |
| Stone Game | Medium | 72.6% | 37.5% | ArrayMathDynamic Programming+1 |
| Snakes and Ladders | Medium | 48.0% | 37.5% | ArrayBreadth-First SearchMatrix |
| Find Servers That Handled Most Number of Requests | Hard | 45.2% | 37.5% | ArrayHeap (Priority Queue)Simulation+1 |
| Count of Integers | Hard | 38.2% | 37.5% | MathStringDynamic Programming |
| Single Number | Easy | 77.3% | 37.5% | ArrayBit Manipulation |
| Jump Game | Medium | 40.5% | 37.5% | ArrayDynamic ProgrammingGreedy |
| Pascal's Triangle | Easy | 78.7% | 37.5% | ArrayDynamic Programming |
| Reverse Words in a String | Medium | 55.5% | 37.5% | Two PointersString |
| Valid Palindrome | Easy | 52.8% | 37.5% | Two PointersString |
| Letter Combinations of a Phone Number | Medium | 65.5% | 37.5% | Hash TableStringBacktracking |
| Meeting Rooms II | Medium | 52.5% | 37.5% | |
| Permutation in String | Medium | 48.4% | 37.5% | Hash TableTwo PointersString+1 |
| Kth Smallest Element in a BST | Medium | 76.5% | 37.5% | TreeDepth-First SearchBinary Search Tree+1 |
| Subarray Sum Equals K | Medium | 46.8% | 37.5% | ArrayHash TablePrefix Sum |
| Permutations | Medium | 81.6% | 37.5% | ArrayBacktracking |
| Can Place Flowers | Easy | 29.0% | 37.5% | ArrayGreedy |
| Rising Temperature | Easy | 51.0% | 37.5% | Database |
| Sliding Window Maximum | Hard | 48.4% | 37.5% | ArrayQueueSliding Window+2 |
| Two Sum IV - Input is a BST | Easy | 63.0% | 37.5% | Hash TableTwo PointersTree+4 |
| Reverse Nodes in k-Group | Hard | 65.3% | 37.5% | Linked ListRecursion |
| Search in Rotated Sorted Array II | Medium | 39.7% | 37.5% | ArrayBinary Search |
| Search in Rotated Sorted Array | Medium | 44.1% | 37.5% | ArrayBinary Search |
| Sort Colors | Medium | 69.1% | 37.5% | ArrayTwo PointersSorting |
| Pow(x, n) | Medium | 38.2% | 37.5% | MathRecursion |
| Convert Binary Number in a Linked List to Integer | Easy | 82.3% | 37.5% | Linked ListMath |
| Find the Duplicate Number | Medium | 64.0% | 37.5% | ArrayTwo PointersBinary Search+1 |
| Integer to English Words | Hard | 34.8% | 37.5% | MathStringRecursion |
| Predict the Winner | Medium | 56.1% | 37.5% | ArrayMathDynamic Programming+2 |
| Design Search Autocomplete System | Hard | 49.7% | 37.5% | |
| Lowest Common Ancestor of a Binary Tree | Medium | 68.7% | 37.5% | TreeDepth-First SearchBinary Tree |
| Word Search | Medium | 46.8% | 37.5% | ArrayStringBacktracking+2 |
| Minimum Window Substring | Hard | 46.9% | 37.5% | Hash TableStringSliding Window |
| Longest Common Subsequence | Medium | 58.9% | 37.5% | StringDynamic Programming |
| Largest Rectangle in Histogram | Hard | 49.3% | 37.5% | ArrayStackMonotonic Stack |
| Interval List Intersections | Medium | 72.9% | 37.5% | ArrayTwo PointersSweep Line |
| Remove All Adjacent Duplicates In String | Easy | 72.8% | 37.5% | StringStack |
| Expressive Words | Medium | 46.7% | 37.5% | ArrayTwo PointersString |