Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 346 | Delete Columns to Make Sorted III | Hard | ArrayStringDynamic Programming |
| 347 | Delete Duplicate Folders in System | Hard | ArrayHash TableString |
| 348 | Delete Greatest Value in Each Row | Easy | ArraySortingHeap (Priority Queue) |
| 349 | Delete Nodes And Return Forest | Medium | ArrayHash TableTree |
| 350 | Delete Nodes From Linked List Present in Array | Medium | ArrayHash TableLinked List |
| 351 | Delete Tree Nodes | Medium | ArrayTreeDepth-First Search |
| 352 | Delivering Boxes from Storage to Ports | Hard | ArrayDynamic ProgrammingSegment Tree |
| 353 | Depth of BST Given Insertion Order | Medium | ArrayTreeBinary Search Tree |
| 354 | Describe the Painting | Medium | ArrayHash TableSorting |
| 355 | Design a 3D Binary Matrix with Efficient Layer Tracking | Medium | ArrayHash TableDesign |
| 356 | Design a Food Rating System | Medium | ArrayHash TableString |
| 357 | Design a Stack With Increment Operation | Medium | ArrayStackDesign |
| 358 | Design a Todo List | Medium | ArrayHash TableString |
| 359 | Design an ATM Machine | Medium | ArrayGreedyDesign |
| 360 | Design an Expression Tree With Evaluate Function | Medium | ArrayMathStack |
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