Practice problems across 75+ categories
Practice problems frequently asked at Ordered Set • 72 problems | 3 Easy | 27 Medium | 42 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Data Stream as Disjoint Intervals | Hard | Hash TableBinary SearchUnion Find |
| 17 | Depth of BST Given Insertion Order | Medium | ArrayTreeBinary Search Tree |
| 18 | Design a 3D Binary Matrix with Efficient Layer Tracking | Medium | ArrayHash TableDesign |
| 19 | Design a Food Rating System | Medium | ArrayHash TableString |
| 20 | Design a Number Container System | Medium | Hash TableDesignHeap (Priority Queue) |
| 21 | Design an Array Statistics Tracker | Hard | Hash TableBinary SearchDesign |
| 22 | Design Log Storage System | Medium | Hash TableStringDesign |
| 23 | Design Movie Rental System | Hard | ArrayHash TableDesign |
| 24 | Design Task Manager | Medium | Hash TableDesignHeap (Priority Queue) |
| 25 | Design Video Sharing Platform | Hard | Hash TableStackDesign |
| 26 | Display Table of Food Orders in a Restaurant | Medium | ArrayHash TableString |
| 27 | Exam Room | Medium | DesignHeap (Priority Queue)Ordered Set |
| 28 | Falling Squares | Hard | ArraySegment TreeOrdered Set |
| 29 | Find Servers That Handled Most Number of Requests | Hard | ArrayHeap (Priority Queue)Simulation |
| 30 | Find the Index of Permutation | Medium | ArrayBinary SearchDivide and Conquer |
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