• Challenges
  • Interview Questions
  • Easy Difficulty

    First ReverseNot Completed

    Solutions: 47377 | Step-by-step solution | Challenge discussion

    First FactorialNot Completed

    Solutions: 33431 | Step-by-step solution | Challenge discussion

    Longest WordNot Completed

    Solutions: 28370 | Step-by-step solution | Challenge discussion

    Letter ChangesNot Completed

    Solutions: 24696 | Step-by-step solution | Challenge discussion

    Simple AddingNot Completed

    Solutions: 22463 | Step-by-step solution | Challenge discussion

    Letter CapitalizeNot Completed

    Solutions: 19094 | Step-by-step solution | Challenge discussion

    Simple SymbolsNot Completed

    Solutions: 14944 | Step-by-step solution | Challenge discussion

    Check NumsNot Completed

    Solutions: 17347 | Step-by-step solution | Challenge discussion

    Time ConvertNot Completed

    Solutions: 12855 | Step-by-step solution | Challenge discussion

    Alphabet SoupNot Completed

    Solutions: 12242 | Step-by-step solution | Challenge discussion

    AB CheckNot Completed

    Solutions: 12129 | Step-by-step solution | Challenge discussion

    Vowel CountNot Completed

    Solutions: 12090 | Step-by-step solution | Challenge discussion

    Word CountNot Completed

    Solutions: 11544 | Step-by-step solution | Challenge discussion

    Ex OhNot Completed

    Solutions: 10735 | Step-by-step solution | Challenge discussion

    PalindromeNot Completed

    Solutions: 12255 | Step-by-step solution | Challenge discussion

    Arith GeoNot Completed

    Solutions: 9234 | Step-by-step solution | Challenge discussion

    Array Addition INot Completed

    Solutions: 5500 | Step-by-step solution | Challenge discussion

    Letter Count INot Completed

    Solutions: 4926 | Step-by-step solution | Challenge discussion

    Second GreatLowNot Completed

    Solutions: 8703 | Step-by-step solution | Challenge discussion

    Division StringifiedNot Completed

    Solutions: 6630 | Step-by-step solution | Challenge discussion

    Counting Minutes INot Completed

    Solutions: 3911 | Step-by-step solution | Challenge discussion

    Mean ModeNot Completed

    Solutions: 5340 | Step-by-step solution | Challenge discussion

    Dash InsertNot Completed

    Solutions: 5800 | Step-by-step solution | Challenge discussion

    Swap CaseNot Completed

    Solutions: 5980 | Step-by-step solution | Challenge discussion

    Number AdditionNot Completed

    Solutions: 5670 | Step-by-step solution | Challenge discussion

    Third GreatestNot Completed

    Solutions: 5173 | Step-by-step solution | Challenge discussion

    Powers of TwoNot Completed

    Solutions: 5766 | Step-by-step solution | Challenge discussion

    Additive PersistenceNot Completed

    Solutions: 3752 | Step-by-step solution | Challenge discussion

    Multiplicative PersistenceNot Completed

    Solutions: 3034 | Step-by-step solution | Challenge discussion

    Off Line MinimumNot Completed

    Solutions: 3918 | Step-by-step solution | Challenge discussion

    Changing SequenceNot Completed

    Solutions: 627 | Step-by-step solution | Challenge discussion

    Overlapping RangesNot Completed

    Solutions: 603 | Step-by-step solution | Challenge discussion

    SuperincreasingNot Completed

    Solutions: 567 | Step-by-step solution | Challenge discussion

    Hamming DistanceNot Completed

    Solutions: 363 | Step-by-step solution | Challenge discussion

    Rectangle AreaNot Completed

    Solutions: 408 | Step-by-step solution | Challenge discussion

    Bitwise OneNot Completed

    Solutions: 424 | Step-by-step solution | Challenge discussion

    Medium Difficulty

    Prime TimeNot Completed

    Solutions: 9783 | Step-by-step solution | Challenge discussion

    Run Length Not Completed

    Solutions: 6619 | Step-by-step solution | Challenge discussion

    Prime MoverNot Completed

    Solutions: 6145 | Step-by-step solution | Challenge discussion

    Palindrome TwoNot Completed

    Solutions: 5578 | Step-by-step solution | Challenge discussion

    DivisionNot Completed

    Solutions: 4988 | Step-by-step solution | Challenge discussion

    String ScrambleNot Completed

    Solutions: 5391 | Step-by-step solution | Challenge discussion

    Arith Geo IINot Completed

    Solutions: 3948 | Step-by-step solution | Challenge discussion

    Array AdditionNot Completed

    Solutions: 3183 | Step-by-step solution | Challenge discussion

    Binary ConverterNot Completed

    Solutions: 3783 | Step-by-step solution | Challenge discussion

    Letter CountNot Completed

    Solutions: 3246 | Step-by-step solution | Challenge discussion

    Simple ModeNot Completed

    Solutions: 3618 | Step-by-step solution | Challenge discussion

    Caesar CipherNot Completed

    Solutions: 3873 | Step-by-step solution | Challenge discussion

    Formatted DivisionNot Completed

    Solutions: 2787 | Step-by-step solution | Challenge discussion

    ConsecutiveNot Completed

    Solutions: 3191 | Step-by-step solution | Challenge discussion

    Counting MinutesNot Completed

    Solutions: 2129 | Step-by-step solution | Challenge discussion

    Permutation StepNot Completed

    Solutions: 2357 | Step-by-step solution | Challenge discussion

    Prime CheckerNot Completed

    Solutions: 1834 | Step-by-step solution | Challenge discussion

    Dash Insert IINot Completed

    Solutions: 3836 | Step-by-step solution | Challenge discussion

    Swap IINot Completed

    Solutions: 2025 | Step-by-step solution | Challenge discussion

    Number SearchNot Completed

    Solutions: 2453 | Step-by-step solution | Challenge discussion

    Triple DoubleNot Completed

    Solutions: 2240 | Step-by-step solution | Challenge discussion

    Bracket MatcherNot Completed

    Solutions: 2116 | Step-by-step solution | Challenge discussion

    String ReductionNot Completed

    Solutions: 1759 | Step-by-step solution | Challenge discussion

    Coin DeterminerNot Completed

    Solutions: 1702 | Step-by-step solution | Challenge discussion

    ThreeFive MultiplesNot Completed

    Solutions: 2141 | Step-by-step solution | Challenge discussion

    Fibonacci CheckerNot Completed

    Solutions: 2049 | Step-by-step solution | Challenge discussion

    Multiple BracketsNot Completed

    Solutions: 1673 | Step-by-step solution | Challenge discussion

    Most Free TimeNot Completed

    Solutions: 1052 | Step-by-step solution | Challenge discussion

    Overlapping RectanglesNot Completed

    Solutions: 1210 | Step-by-step solution | Challenge discussion

    Distinct ListNot Completed

    Solutions: 1884 | Step-by-step solution | Challenge discussion

    Look Say SequenceNot Completed

    Solutions: 1022 | Step-by-step solution | Challenge discussion

    Number EncodingNot Completed

    Solutions: 1079 | Step-by-step solution | Challenge discussion

    Stock PickerNot Completed

    Solutions: 229 | Step-by-step solution | Challenge discussion

    Max SubarrayNot Completed

    Solutions: 85 | Step-by-step solution | Challenge discussion

    Missing DigitNot Completed

    Solutions: 52 | Step-by-step solution | Challenge discussion

    K Unique CharactersNot Completed

    Solutions: 22 | Step-by-step solution | Challenge discussion

    Bitmap HolesNot Completed

    Solutions: 21 | Step-by-step solution | Challenge discussion

    Symmetric TreeNot Completed

    Solutions: 13 | Step-by-step solution | Challenge discussion

    Binary Search Tree LCANot Completed

    Solutions: 7 | Step-by-step solution | Challenge discussion

    Hard Difficulty

    Shortest PathNot Completed

    Solutions: 802 | Step-by-step solution | Challenge discussion

    Pattern ChaserNot Completed

    Solutions: 519 | Step-by-step solution | Challenge discussion

    CalculatorNot Completed

    Solutions: 920 | Step-by-step solution | Challenge discussion

    Weighted PathNot Completed

    Solutions: 280 | Step-by-step solution | Challenge discussion

    Intersecting LinesNot Completed

    Solutions: 445 | Step-by-step solution | Challenge discussion

    RREF MatrixNot Completed

    Solutions: 97 | Step-by-step solution | Challenge discussion

    Polynomial ExpansionNot Completed

    Solutions: 237 | Step-by-step solution | Challenge discussion

    Gas StationNot Completed

    Solutions: 439 | Step-by-step solution | Challenge discussion

    Symmetric MatrixNot Completed

    Solutions: 311 | Step-by-step solution | Challenge discussion

    Switch SortNot Completed

    Solutions: 226 | Step-by-step solution | Challenge discussion

    Matrix DeterminantNot Completed

    Solutions: 226 | Step-by-step solution | Challenge discussion

    Queen CheckNot Completed

    Solutions: 382 | Step-by-step solution | Challenge discussion

    Noughts DeterminerNot Completed

    Solutions: 331 | Step-by-step solution | Challenge discussion

    Blackjack HighestNot Completed

    Solutions: 410 | Step-by-step solution | Challenge discussion

    Transitivity RelationsNot Completed

    Solutions: 388 | Step-by-step solution | Challenge discussion

    Alphabet Run EncryptionNot Completed

    Solutions: 216 | Step-by-step solution | Challenge discussion

    Knight JumpsNot Completed

    Solutions: 462 | Step-by-step solution | Challenge discussion

    Line OrderingNot Completed

    Solutions: 35 | Step-by-step solution | Challenge discussion

    Sudoku Quadrant CheckerNot Completed

    Solutions: 81 | Step-by-step solution | Challenge discussion

    Quick KnightNot Completed

    Solutions: 32 | Step-by-step solution | Challenge discussion

    Square FiguresNot Completed

    Solutions: 69 | Step-by-step solution | Challenge discussion

    Connect Four WinnerNot Completed

    Solutions: 49 | Step-by-step solution | Challenge discussion

    Array JumpingNot Completed

    Solutions: 38 | Step-by-step solution | Challenge discussion

    Matrix BorderNot Completed

    Solutions: 43 | Step-by-step solution | Challenge discussion

    Roman Numeral ReductionNot Completed

    Solutions: 42 | Step-by-step solution | Challenge discussion

    Parallel SumsNot Completed

    Solutions: 56 | Step-by-step solution | Challenge discussion

    LCSNot Completed

    Solutions: 37 | Step-by-step solution | Challenge discussion

    Nim WinnerNot Completed

    Solutions: 26 | Step-by-step solution | Challenge discussion

    Farthest NodesNot Completed

    Solutions: 126 | Step-by-step solution | Challenge discussion

    Optimal AssignmentsNot Completed

    Solutions: 463 | Step-by-step solution | Challenge discussion

    Kaprekars ConstantNot Completed

    Solutions: 62 | Step-by-step solution | Challenge discussion

    Hamiltonian PathNot Completed

    Solutions: 112 | Step-by-step solution | Challenge discussion

    Vertex CoveringNot Completed

    Solutions: 114 | Step-by-step solution | Challenge discussion

    Step WalkingNot Completed

    Solutions: 40 | Step-by-step solution | Challenge discussion

    Pascals TriangleNot Completed

    Solutions: 48 | Step-by-step solution | Challenge discussion

    Reverse Polish NotationNot Completed

    Solutions: 167 | Step-by-step solution | Challenge discussion

    Max Heap CheckerNot Completed

    Solutions: 46 | Step-by-step solution | Challenge discussion

    Chessboard TravelingNot Completed

    Solutions: 36 | Step-by-step solution | Challenge discussion

    Matching CouplesNot Completed

    Solutions: 63 | Step-by-step solution | Challenge discussion

    Approaching FibonacciNot Completed

    Solutions: 60 | Step-by-step solution | Challenge discussion

    Simple SATNot Completed

    Solutions: 28 | Step-by-step solution | Challenge discussion

    Array CouplesNot Completed

    Solutions: 40 | Step-by-step solution | Challenge discussion

    Array RotationNot Completed

    Solutions: 54 | Step-by-step solution | Challenge discussion

    Bracket CombinationsNot Completed

    Solutions: 52 | Step-by-step solution | Challenge discussion

    Counting AnagramsNot Completed

    Solutions: 47 | Step-by-step solution | Challenge discussion

    Maximal SquareNot Completed

    Solutions: 7 | Step-by-step solution | Challenge discussion

    Maximal RectangleNot Completed

    Solutions: 11 | Step-by-step solution | Challenge discussion