Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 211 | Design Add and Search Words Data Structure | Medium | StringDepth-First SearchDesign |
| 212 | Word Search II | Hard | ArrayStringBacktracking |
| 213 | House Robber II | Medium | ArrayDynamic Programming |
| 214 | Shortest Palindrome | Hard | StringRolling HashString Matching |
| 215 | Kth Largest Element in an Array | Medium | ArrayDivide and ConquerSorting |
| 216 | Combination Sum III | Medium | ArrayBacktracking |
| 217 | Contains Duplicate | Easy | ArrayHash TableSorting |
| 218 | Maximal Square | Medium | ArrayDynamic ProgrammingMatrix |
| 218 | The Skyline Problem | Hard | ArrayDivide and ConquerBinary Indexed Tree |
| 219 | Contains Duplicate II | Easy | ArrayHash TableSliding Window |
| 220 | Contains Duplicate III | Hard | ArraySliding WindowSorting |
| 222 | Count Complete Tree Nodes | Easy | Binary SearchBit ManipulationTree |
| 223 | Rectangle Area | Medium | MathGeometry |
| 224 | Basic Calculator | Hard | MathStringStack |
| 225 | Implement Stack using Queues | Easy | StackDesignQueue |
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