Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2671 | Random Pick Index | Medium | Hash TableMathReservoir Sampling |
| 2672 | Random Pick with Blacklist | Hard | ArrayHash TableMath |
| 2673 | Random Pick with Weight | Medium | ArrayMathBinary Search |
| 2674 | Random Point in Non-overlapping Rectangles | Medium | ArrayMathBinary Search |
| 2675 | Range Addition | Medium | ArrayPrefix Sum |
| 2676 | Range Addition II | Easy | ArrayMath |
| 2677 | Range Frequency Queries | Medium | ArrayHash TableBinary Search |
| 2678 | Range Module | Hard | DesignSegment TreeOrdered Set |
| 2679 | Range Product Queries of Powers | Medium | ArrayBit ManipulationPrefix Sum |
| 2680 | Range Sum of BST | Easy | TreeDepth-First SearchBinary Search Tree |
| 2681 | Range Sum of Sorted Subarray Sums | Medium | ArrayTwo PointersBinary Search |
| 2682 | Range Sum Query 2D - Immutable | Medium | ArrayDesignMatrix |
| 2683 | Range Sum Query 2D - Mutable | Medium | ArrayDesignBinary Indexed Tree |
| 2684 | Range Sum Query - Immutable | Easy | ArrayDesignPrefix Sum |
| 2685 | Range Sum Query - Mutable | Easy | ArrayDivide and ConquerDesign |
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