Practice problems across 75+ categories
Practice problems frequently asked at Apple • 571 problems | 192 Easy | 283 Medium | 92 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 526 | Teemo Attacking | Easy | ArraySimulation |
| 527 | The Maze II | Medium | ArrayDepth-First SearchBreadth-First Search |
| 528 | The Most Recent Orders for Each Product | Medium | Database |
| 529 | The Most Recent Three Orders | Medium | Database |
| 530 | The Number of Passengers in Each Bus II | Hard | Database |
| 531 | The Number of the Smallest Unoccupied Chair | Medium | ArrayHash TableHeap (Priority Queue) |
| 532 | The Number of Ways to Make the Sum | Medium | ArrayDynamic Programming |
| 533 | The Time When the Network Becomes Idle | Medium | ArrayBreadth-First SearchGraph |
| 534 | Third Maximum Number | Easy | ArraySorting |
| 535 | Thousand Separator | Easy | String |
| 536 | Time Based Key-Value Store | Medium | Hash TableStringBinary Search |
| 537 | Time Needed to Buy Tickets | Easy | ArrayQueueSimulation |
| 538 | To Lower Case | Easy | String |
| 539 | Top K Frequent Elements | Medium | ArrayHash TableDivide and Conquer |
| 540 | Top K Frequent Words | Medium | ArrayHash TableString |
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