171 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 973. K Closest Points to Origin | Medium | 27.3% | TopicsArrayMathDivide and ConquerGeometrySortingHeap (Priority Queue)QuickselectK-D Tree |
| 1197. Minimum Knight Moves | Medium | 27.3% | TopicsBreadth-First SearchHeuristic SearchBidirectional SearchA* Search |
| 226. Invert Binary Tree | Easy | 27.3% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| Closest Leaf in a Binary Tree | Medium | 27.3% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| Dot Product of Two Sparse Vectors | Medium | 27.3% | TopicsArrayHash TableTwo PointersDesignLinear Algebra |
| Implement Rand10() Using Rand7() | Medium | 27.3% | TopicsMathRejection SamplingRandomizedProbability and Statistics |
| 542. 01 Matrix | Medium | 27.3% | TopicsArrayDynamic ProgrammingBreadth-First SearchMatrix |
| 875. Koko Eating Bananas | Medium | 27.3% | TopicsArrayBinary Search |
| 785. Is Graph Bipartite? | Medium | 27.3% | TopicsDepth-First SearchBreadth-First SearchUnion-FindGraph TheoryGraph ColoringBipartite Graph |
| 560. Subarray Sum Equals K | Medium | 27.3% | TopicsArrayHash TablePrefix Sum |
| 827. Making A Large Island | Hard | 27.3% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| 207. Course Schedule | Medium | 27.3% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological SortDirected Acyclic Graph |
| Best Meeting Point | Hard | 27.3% | TopicsArrayMathSortingMatrix |
| 84. Largest Rectangle in Histogram | Hard | 27.3% | TopicsArrayStackMonotonic StackRange Minimum/Maximum Query |
| 752. Open the Lock | Medium | 27.3% | TopicsArrayHash TableStringBreadth-First SearchBidirectional Search |
| 994. Rotting Oranges | Medium | 27.3% | TopicsArrayBreadth-First SearchMatrix |
| Search in Rotated Sorted Array II | Medium | 27.3% | TopicsArrayBinary Search |
| 3367. Maximize Sum of Weights after Edge Removals | Hard | 27.3% | TopicsDynamic ProgrammingTreeDepth-First SearchSorting |
| 5. Longest Palindromic Substring | Medium | 20.3% | TopicsTwo PointersStringDynamic ProgrammingManacher |
| 88. Merge Sorted Array | Easy | 20.3% | TopicsArrayTwo PointersSorting |
| 143. Reorder List | Medium | 20.3% | TopicsLinked ListTwo PointersStackRecursion |
| 763. Partition Labels | Medium | 20.3% | TopicsHash TableTwo PointersStringGreedy |
| 139. Word Break | Medium | 20.3% | TopicsArrayHash TableStringDynamic ProgrammingTrieMemoizationBrute-Force Search |
| H-Index | Medium | 20.3% | TopicsArraySortingCounting Sort |
| 925. Long Pressed Name | Easy | 20.3% | TopicsTwo PointersString |
