Practice problems across 75+ categories
Practice problems frequently asked at Math • 596 problems | 150 Easy | 283 Medium | 161 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 391 | Moving Stones Until Consecutive II | Medium | ArrayMathSliding Window |
| 392 | Multiply Strings | Medium | MathStringSimulation |
| 393 | Multiply Two Polynomials | Hard | ArrayMath |
| 394 | N-th Tribonacci Number | Easy | MathDynamic ProgrammingMemoization |
| 395 | Narcissistic Number Checker | Easy | FunctionsFunctionsMath |
| 396 | New 21 Game | Medium | MathDynamic ProgrammingSliding Window |
| 397 | Next Greater Element III | Medium | MathTwo PointersString |
| 398 | Next Greater Numerically Balanced Number | Medium | Hash TableMathBacktracking |
| 399 | Nim Game | Easy | MathBrainteaserGame Theory |
| 400 | Nth Digit | Medium | MathBinary Search |
| 401 | Nth Magical Number | Hard | MathBinary Search |
| 402 | Number of Beautiful Integers in the Range | Hard | MathDynamic Programming |
| 403 | Number of Beautiful Pairs | Easy | ArrayHash TableMath |
| 404 | Number of Boomerangs | Medium | ArrayHash TableMath |
| 405 | Number of Burgers with No Waste of Ingredients | Medium | Math |
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