Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 661 | Image Smoother | Easy | ArrayMatrix |
| 662 | Maximum Width of Binary Tree | Medium | TreeDepth-First SearchBreadth-First Search |
| 663 | Equal Tree Partition | Medium | TreeDepth-First SearchBinary Tree |
| 664 | Strange Printer | Hard | StringDynamic Programming |
| 665 | Non-decreasing Array | Medium | Array |
| 666 | Path Sum IV | Medium | ArrayHash TableTree |
| 667 | Beautiful Arrangement II | Medium | ArrayMath |
| 668 | Kth Smallest Number in Multiplication Table | Hard | MathBinary Search |
| 669 | Trim a Binary Search Tree | Medium | TreeDepth-First SearchBinary Search Tree |
| 670 | Maximum Swap | Medium | MathGreedy |
| 671 | Second Minimum Node In a Binary Tree | Easy | TreeDepth-First SearchBinary Tree |
| 672 | Bulb Switcher II | Medium | MathBit ManipulationDepth-First Search |
| 672 | Cut Off Trees for Golf Event | Hard | ArrayBreadth-First SearchHeap (Priority Queue) |
| 673 | Number of Longest Increasing Subsequence | Medium | ArrayDynamic ProgrammingBinary Indexed Tree |
| 674 | Longest Continuous Increasing Subsequence | Easy | Array |
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