24 problems

Math interview problems

24 Math problems, from easy to hard. Each one has an editorial explaining the approach and its complexity, and a visualizer that runs the solution step by step on the example input or your own.

Easy (10)

9. Palindrome NumberEasy
13. Roman to IntegerEasy
64. Add BinaryEasy
197. Missing NumberEasy
241. Add StringsEasy
305. Rectangle OverlapEasy
376. Count Days Spent TogetherEasy
402. Check Divisibility by Digit Sum and ProductEasy
411. Count Commas in RangeEasy
413. Construct Uniform Parity Array IEasy

Medium (11)

7. Reverse IntegerMedium
12. Integer to RomanMedium
41. Multiply StringsMedium
47. Pow(x, n)Medium
149. Factorial Trailing ZeroesMedium
237. Rotate FunctionMedium
269. Next Greater Element IIIMedium
367. Stone Game IXMedium
368. Minimum Operations to Make a Uni-Value GridMedium
412. Count Commas in Range IIMedium
414. Construct Uniform Parity Array IIMedium

Hard (3)

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