Problem set
Math questions
73 matching · 26 easy · 39 medium · 8 hard
- 02Add Two NumbersMedium
- 07Reverse IntegerMedium
- 08String to Integer (atoi)Medium
- 09Palindrome NumberEasy
- 12Integer to RomanMedium
- 13Roman to IntegerEasy
- 29Divide Two IntegersMedium
- 43Multiply StringsMedium
- 48Rotate ImageMedium
- 50Pow(x, n)Medium
- 60Permutation SequenceHard
- 62Unique PathsMedium
- 66Plus OneEasy
- 67Add BinaryEasy
- 69Sqrt(x)Easy
- 70Climbing StairsEasy
- 89Gray CodeMedium
- 96Unique Binary Search TreesMedium
- 149Max Points on a LineHard
- 150Evaluate Reverse Polish NotationMedium
- 164Fraction to Recurring DecimalMedium
- 166Excel Sheet Column TitleEasy
- 168Excel Sheet Column NumberEasy
- 169Factorial Trailing ZeroesMedium
- 175Rotate ArrayMedium
- 182Happy NumberEasy
- 184Count PrimesMedium
- 203Rectangle AreaMedium
- 204Basic CalculatorHard
- 207Basic Calculator IIMedium
- 211Power of TwoEasy
- 213Number of Digit OneHard
- 221Different Ways to Add ParenthesesMedium
- 231Add DigitsEasy
- 235Ugly NumberEasy
- 236Ugly Number IIMedium
- 238Missing NumberEasy
- 242Integer to English WordsHard
- 248Perfect SquaresMedium
- 249Expression Add OperatorsHard
- 257Nim GameEasy
- 273Bulb SwitcherMedium
- 278Power of ThreeEasy
- 289Power of FourEasy
- 290Integer BreakMedium
- 306Valid Perfect SquareEasy
- 312Guess Number Higher or Lower IIMedium
- 318Linked List Random NodeMedium
- 320Shuffle an ArrayMedium
- 329Random Pick IndexMedium
- 339Fizz BuzzEasy
- 342Add StringsEasy
- 357Arranging CoinsEasy
- 372Minimum Moves to Equal Array Elements IIMedium
- 375Implement Rand10() Using Rand7()Medium
- 391Fibonacci NumberEasy
- 399Random Pick with WeightMedium
- 406Minimum Time DifferenceMedium
- 414Next Greater Element IIIMedium
- 432Maximum Product of Three NumbersEasy
- 439Set MismatchEasy
- 4432 Keys KeyboardMedium
- 451Maximum SwapMedium
- 45424 GameHard
- 499Basic Calculator IIIHard
- 538Stone GameMedium
- 561Minimum Area RectangleMedium
- 581Add to Array-Form of IntegerEasy
- 590Pairs of Songs With Total Durations Divisible by 60Medium
- 596Greatest Common Divisor of StringsEasy
- 600N-th Tribonacci NumberEasy
- 654Detect SquaresMedium
- 665Number of Zero-Filled SubarraysMedium