Practice problems across 75+ categories
Practice problems frequently asked at Apple • 571 problems | 192 Easy | 283 Medium | 92 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 406 | Perfect Number | Easy | Math |
| 407 | Perfect Rectangle | Hard | ArrayHash TableMath |
| 408 | Plus One | Easy | ArrayMath |
| 409 | Populating Next Right Pointers in Each Node II | Medium | Linked ListTreeDepth-First Search |
| 410 | Pour Water | Medium | ArraySimulation |
| 411 | Power of Four | Easy | MathBit ManipulationRecursion |
| 412 | Power of Three | Easy | MathRecursion |
| 413 | Pow(x, n) | Medium | MathRecursion |
| 414 | Prime In Diagonal | Easy | ArrayMathMatrix |
| 415 | Prime Number of Set Bits in Binary Representation | Easy | MathBit Manipulation |
| 416 | Print Binary Tree | Medium | TreeDepth-First SearchBreadth-First Search |
| 417 | Print Zero Even Odd | Medium | Concurrency |
| 418 | Product of Array Except Self | Medium | ArrayPrefix Sum |
| 419 | Product Sales Analysis III | Medium | Database |
| 420 | Product Sales Analysis V | Easy | Database |
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