Practice problems across 75+ categories
Practice problems frequently asked at Math • 596 problems | 150 Easy | 283 Medium | 161 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 436 | Path In Zigzag Labelled Binary Tree | Medium | MathTreeBinary Tree |
| 437 | Perfect Number | Easy | Math |
| 438 | Perfect Rectangle | Hard | ArrayHash TableMath |
| 439 | Perfect Squares | Medium | MathDynamic ProgrammingBreadth-First Search |
| 440 | Perform String Shifts | Easy | ArrayMathString |
| 441 | Permutation Sequence | Hard | MathRecursion |
| 442 | Permutations IV | Hard | ArrayMathCombinatorics |
| 443 | Plus One | Easy | ArrayMath |
| 444 | Plus One Linked List | Medium | Linked ListMath |
| 445 | Poor Pigs | Hard | MathDynamic ProgrammingCombinatorics |
| 446 | Power of Four | Easy | MathBit ManipulationRecursion |
| 447 | Power of Heroes | Hard | ArrayMathDynamic Programming |
| 448 | Power of Three | Easy | MathRecursion |
| 449 | Power of Two | Easy | MathBit ManipulationRecursion |
| 450 | Powerful Integers | Medium | Hash TableMathEnumeration |
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