| Find Followers Count | Easy | 69.5% | 100.0% | Database |
| Minimum Changes To Make Alternating Binary String | Easy | 63.8% | 100.0% | String |
| Merge Intervals | Medium | 51.1% | 100.0% | ArraySorting |
| Longest Substring Without Repeating Characters | Medium | 38.5% | 87.5% | Hash TableStringSliding Window |
| Valid Parentheses | Easy | 43.7% | 87.5% | StringStack |
| Best Time to Buy and Sell Stock | Easy | 56.4% | 87.5% | ArrayDynamic Programming |
| LRU Cache | Medium | 46.8% | 87.5% | Hash TableLinked ListDesign+1 |
| Number of Islands | Medium | 63.8% | 87.5% | ArrayDepth-First SearchBreadth-First Search+2 |
| Basic Calculator II | Medium | 46.6% | 87.5% | MathStringStack |
| Design Circular Queue | Medium | 54.0% | 87.5% | ArrayLinked ListDesign+1 |
| Building H2O | Medium | 58.3% | 87.5% | Concurrency |
| Trapping Rain Water | Hard | 66.8% | 87.5% | ArrayTwo PointersDynamic Programming+2 |
| Letter Combinations of a Phone Number | Medium | 65.5% | 75.0% | Hash TableStringBacktracking |
| Top K Frequent Elements | Medium | 65.8% | 75.0% | ArrayHash TableDivide and Conquer+5 |
| Reorganize String | Medium | 56.8% | 75.0% | Hash TableStringGreedy+3 |
| Container With Most Water | Medium | 59.5% | 62.5% | ArrayTwo PointersGreedy |
| 3Sum | Medium | 38.6% | 62.5% | ArrayTwo PointersSorting |
| Valid Anagram | Easy | 67.8% | 62.5% | Hash TableStringSorting |
| Maximum Subarray | Medium | 53.0% | 62.5% | ArrayDivide and ConquerDynamic Programming |
| Two Sum | Easy | 57.1% | 62.5% | ArrayHash Table |
| Reverse Nodes in k-Group | Hard | 65.3% | 50.0% | Linked ListRecursion |
| Move Zeroes | Easy | 63.5% | 50.0% | ArrayTwo Pointers |
| Serialize and Deserialize Binary Tree | Hard | 60.3% | 50.0% | StringTreeDepth-First Search+3 |
| Flatten Nested List Iterator | Medium | 65.6% | 50.0% | StackTreeDepth-First Search+3 |
| Design Tic-Tac-Toe | Medium | 58.7% | 50.0% | |
| Decode the Message | Easy | 85.8% | 50.0% | Hash TableString |
| Max Area of Island | Medium | 73.8% | 50.0% | ArrayDepth-First SearchBreadth-First Search+2 |
| Combination Sum II | Medium | 59.0% | 50.0% | ArrayBacktracking |
| Is Subsequence | Easy | 48.8% | 50.0% | Two PointersStringDynamic Programming |
| Longest Palindromic Substring | Medium | 37.3% | 50.0% | Two PointersStringDynamic Programming |
| Moving Average from Data Stream | Easy | 80.2% | 50.0% | |
| First Missing Positive | Hard | 42.4% | 50.0% | ArrayHash Table |
| Basic Calculator | Hard | 46.5% | 50.0% | MathStringStack+1 |
| Longest Consecutive Sequence | Medium | 47.0% | 50.0% | ArrayHash TableUnion-Find |
| Intersection of Two Linked Lists | Easy | 63.2% | 50.0% | Hash TableLinked ListTwo Pointers |
| Course Schedule | Medium | 50.8% | 50.0% | Depth-First SearchBreadth-First SearchGraph Theory+1 |
| Rotate Image | Medium | 79.3% | 50.0% | ArrayMathMatrix |
| Evaluate Reverse Polish Notation | Medium | 57.0% | 50.0% | ArrayMathStack |
| Reverse Linked List | Easy | 80.2% | 50.0% | Linked ListRecursion |
| Design Twitter | Medium | 44.2% | 50.0% | Hash TableLinked ListDesign+1 |
| Shortest Bridge | Medium | 59.3% | 50.0% | ArrayDepth-First SearchBreadth-First Search+1 |
| Rotting Oranges | Medium | 58.1% | 50.0% | ArrayBreadth-First SearchMatrix |
| Happy Number | Easy | 59.2% | 50.0% | Hash TableMathTwo Pointers |
| UTF-8 Validation | Medium | 46.0% | 50.0% | ArrayBit Manipulation |
| Evaluate Division | Medium | 64.0% | 50.0% | ArrayStringDepth-First Search+4 |
| Design Parking System | Easy | 87.1% | 50.0% | DesignSimulationCounting |