Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 270 | Closest Binary Search Tree Value | Easy | Binary SearchTreeDepth-First Search |
| 271 | Encode and Decode Strings | Medium | ArrayStringDesign |
| 273 | Integer to English Words | Hard | MathStringRecursion |
| 274 | H-Index | Medium | ArraySortingCounting Sort |
| 275 | H-Index II | Medium | ArrayBinary Search |
| 276 | Paint Fence | Medium | Dynamic Programming |
| 277 | Find the Celebrity | Medium | Two PointersGraphInteractive |
| 278 | First Bad Version | Easy | Binary SearchInteractive |
| 278 | Zigzag Iterator | Medium | ArrayDesignQueue |
| 279 | Perfect Squares | Medium | MathDynamic ProgrammingBreadth-First Search |
| 280 | Wiggle Sort | Medium | ArrayGreedySorting |
| 282 | Expression Add Operators | Hard | MathStringBacktracking |
| 283 | Move Zeroes | Easy | ArrayTwo Pointers |
| 284 | Peeking Iterator | Medium | ArrayDesignIterator |
| 285 | Inorder Successor in BST | Medium | TreeDepth-First SearchBinary Search Tree |
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