Coding problems
Algorithm problems with tests in Python, JavaScript, Java, Go and C++, checked on our server.
Adding Digit ListsMediumBackwards Digits in 32 BitsMediumA Number That Reads Both WaysEasyNumber in Roman NumeralsMediumValue of a Roman NumeralEasyDivision Without DividingMediumMultiplying Digit StringsMediumTurn a Square ClockwiseMediumFast ExponentiationMediumThe K-th Ordering of DigitsHardCounting Grid RoutesMediumAdd One to a Digit ArrayEasySum of Binary StringsEasyWhole Square RootEasyPaving a Garden PathEasyMirrored One-Bit CodesMediumCounting Search Tree ShapesMediumStars on One Straight LineHardPostfix CalculatorMediumFraction as a DecimalMediumSpreadsheet Column LabelEasySpreadsheet Column IndexEasyZeros at the End of n!MediumRoll an Array to the RightMediumDigit Squares Down to OneEasyPrimes Below a BoundMediumArea Under Two RectanglesMediumPlus-Minus Calculator With BracketsHardFour-Operation CalculatorMediumOnly Twos MultipliedEasyHow Many Ones Are WrittenHardEvery Bracketing ResultMediumFold the Digits Down to OneEasyOnly Factors 2, 3 and 5EasyNumbers Made of Twos, Threes and FivesMediumThe Lost TicketEasyAmount in WordsHardFewest Square TermsMediumSigns Between the DigitsHardStone Pile: Who Moves FirstEasyWhere the Friends Should MeetHardNth Number Built From Given PrimesMediumLamps Left BurningMediumOnly Threes MultipliedEasyDoes the Robot Cross Its TrailHardOnly Fours MultipliedEasySplit for the Largest ProductMediumVertical Mirror LineMediumNumbers Without Repeated DigitsMediumSorted Parabola ValuesMedium
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