Practice problems across 75+ categories
Practice problems frequently asked at Design • 128 problems | 15 Easy | 81 Medium | 30 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 106 | Range Sum Query 2D - Mutable | Medium | ArrayDesignBinary Indexed Tree |
| 107 | Range Sum Query - Immutable | Easy | ArrayDesignPrefix Sum |
| 108 | Range Sum Query - Mutable | Easy | ArrayDivide and ConquerDesign |
| 109 | RLE Iterator | Medium | ArrayDesignCounting |
| 110 | Seat Reservation Manager | Medium | DesignHeap (Priority Queue) |
| 111 | Sequentially Ordinal Rank Tracker | Hard | DesignHeap (Priority Queue)Data Stream |
| 112 | Serialize and Deserialize Binary Tree | Hard | StringTreeDepth-First Search |
| 113 | Serialize and Deserialize BST | Medium | StringTreeDepth-First Search |
| 114 | Shortest Word Distance II | Medium | ArrayHash TableTwo Pointers |
| 115 | Shuffle an Array | Medium | ArrayMathDesign |
| 116 | Simple Bank System | Medium | ArrayHash TableDesign |
| 117 | Smallest Number in Infinite Set | Medium | Hash TableDesignHeap (Priority Queue) |
| 118 | Snapshot Array | Medium | ArrayHash TableBinary Search |
| 119 | Stock Price Fluctuation | Medium | Hash TableDesignHeap (Priority Queue) |
| 120 | Stream of Characters | Hard | ArrayStringDesign |
Powerful online tools to boost your productivity
Coding Ground For Developers
Code, Edit, Run and ShareIgnite your coding potential on Coding Ground - an immersive online platform for hands-on learning, collaboration, and skill development.
