1Angle Between Hands of a ClockMediumMath
Solve → 2Pow(x, n)MediumMathRecursion
Solve → 3Total Waviness of Numbers in Range IIHardMathDynamic Programming
Solve → 4Perfect SquaresMediumMathDynamic ProgrammingBreadth-First Search
Solve → 5Climbing StairsEasyMathDynamic ProgrammingMemoization
Solve → 8Pow(x, n)MediumMathRecursion
Solve → 9Fizz BuzzEasyMathStringSimulation
Solve → 10Total Waviness of Numbers in Range IIHardMathDynamic Programming
Solve → 11Perfect SquaresMediumMathDynamic ProgrammingBreadth-First Search
Solve → 12Angle Between Hands of a ClockMediumMath
Solve → 13Sqrt(x)EasyMathBinary Search
Solve → 14Basic CalculatorHardMathStringStack
Solve → 15Power of TwoEasyMathBit ManipulationRecursion
Solve → 16Guess Number Higher or Lower IIMediumMathDynamic ProgrammingGame Theory
Solve → 17Next Greater Element IIIMediumMathTwo PointersString
Solve → 18Number of ZigZag Arrays IIHardMathDynamic Programming
Solve → 19Climbing StairsEasyMathDynamic ProgrammingMemoization
Solve → 20Sqrt(x)EasyMathBinary Search
Solve → 23Pow(x, n)MediumMathRecursion
Solve → 24Add BinaryEasyMathStringBit Manipulation
Solve → 25Fizz BuzzEasyMathStringSimulation
Solve → 26Power of TwoEasyMathBit ManipulationRecursion
Solve → 27Total Waviness of Numbers in Range IIHardMathDynamic Programming
Solve → 28Fibonacci NumberEasyMathDynamic ProgrammingRecursion
Solve → 29Basic Calculator IIMediumMathStringStack
Solve → 30Elimination GameMediumMathRecursion
Solve → 31Power of ThreeEasyMathRecursion
Solve → 32Perfect SquaresMediumMathDynamic ProgrammingBreadth-First Search
Solve → 33Angle Between Hands of a ClockMediumMath
Solve → 34Divide Two IntegersMediumMathBit Manipulation
Solve → 35Number of Digit OneHardMathDynamic ProgrammingRecursion
Solve → 37Concatenation of Consecutive Binary NumbersMediumMathBit ManipulationSimulation
Solve → 38Check Digitorial PermutationMediumMathCounting
Solve → 39Fancy SequenceHardMathDesignSegment Tree
Solve → 40Basic CalculatorHardMathStringStack
Solve → 41Three DivisorsEasyMathEnumerationNumber Theory
Solve → 42Guess Number Higher or Lower IIMediumMathDynamic ProgrammingGame Theory
Solve → 43Permutation SequenceHardMathRecursion
Solve → 44Next Greater Element IIIMediumMathTwo PointersString
Solve → 45Convert a Number to HexadecimalEasyMathStringBit Manipulation
Solve → 46Number of ZigZag Arrays IIHardMathDynamic Programming
Solve → 49Climbing StairsEasyMathDynamic ProgrammingMemoization
Solve → 50Sqrt(x)EasyMathBinary Search
Solve → 51Pow(x, n)MediumMathRecursion
Solve → 52Add BinaryEasyMathStringBit Manipulation
Solve → 53Unique PathsMediumMathDynamic ProgrammingCombinatorics
Solve → 54Fibonacci NumberEasyMathDynamic ProgrammingRecursion
Solve → 55Divide Two IntegersMediumMathBit Manipulation
Solve → 56Power of TwoEasyMathBit ManipulationRecursion
Solve → 57Add DigitsEasyMathSimulationNumber Theory
Solve → 58Arranging CoinsEasyMathBinary Search
Solve → 60Count Good NumbersMediumMathRecursion
Solve → 61Maximum SwapMediumMathGreedy
Solve → 62Number of Digit OneHardMathDynamic ProgrammingRecursion
Solve → 63Basic CalculatorHardMathStringStack
Solve → 64Perfect SquaresMediumMathDynamic ProgrammingBreadth-First Search
Solve → 65Sum of Two IntegersMediumMathBit Manipulation
Solve → 66Factorial Trailing ZeroesMediumMath
Solve → 67Multiply StringsMediumMathStringSimulation
Solve → 68Fizz BuzzEasyMathStringSimulation
Solve → 69Sum of Square NumbersMediumMathTwo PointersBinary Search
Solve → 70Greatest Common Divisor of StringsEasyMathString
Solve → 71Different Ways to Add ParenthesesMediumMathStringDynamic Programming
Solve → 72Excel Sheet Column TitleEasyMathString
Solve → 73Basic Calculator IIMediumMathStringStack
Solve → 74Permutation SequenceHardMathRecursion
Solve → 75Power of ThreeEasyMathRecursion
Solve → 77Largest Odd Number in StringEasyMathStringGreedy
Solve → 78Find the Punishment Number of an IntegerMediumMathBacktracking
Solve → 79Count the Number of Arrays with K Matching Adjacent ElementsHardMathCombinatorics
Solve → 81Valid Perfect SquareEasyMathBinary Search
Solve → 82Find the Maximum Achievable NumberEasyMath
Solve → 83Next Greater Element IIIMediumMathTwo PointersString
Solve → 84Count Symmetric IntegersEasyMathEnumeration
Solve → 85Find the K-th Character in String Game IEasyMathBit ManipulationRecursion
Solve → 86Integer to English WordsHardMathStringRecursion
Solve → 87Integer BreakMediumMathDynamic Programming
Solve → 88Elimination GameMediumMathRecursion
Solve → 89N-th Tribonacci NumberEasyMathDynamic ProgrammingMemoization
Solve → 90Excel Sheet Column NumberEasyMathString
Solve → 91Check if Number is a Sum of Powers of ThreeMediumMath
Solve → 92Expression Add OperatorsHardMathStringBacktracking
Solve → 93New 21 GameMediumMathDynamic ProgrammingSliding Window
Solve → 94Convert a Number to HexadecimalEasyMathStringBit Manipulation
Solve → 952 Keys KeyboardMediumMathDynamic Programming
Solve → 96Gray CodeMediumMathBacktrackingBit Manipulation
Solve → 97Add StringsEasyMathStringSimulation
Solve → 98Divisor GameEasyMathDynamic ProgrammingBrainteaser
Solve → 99Smallest Even MultipleEasyMathNumber Theory
Solve → 100K-th Symbol in GrammarMediumMathBit ManipulationRecursion
Solve → 101Angle Between Hands of a ClockMediumMath
Solve → 102Power of FourEasyMathBit ManipulationRecursion
Solve → 103Maximum 69 NumberEasyMathGreedy
Solve → 104Divisible and Non-divisible Sums DifferenceEasyMath
Solve → 105Closest Prime Numbers in RangeMediumMathNumber Theory
Solve → 106Max Difference You Can Get From Changing an IntegerMediumMathGreedy
Solve → 107Number of Steps to Reduce a Number to ZeroEasyMathBit Manipulation
Solve → 108Unique Binary Search TreesMediumMathDynamic ProgrammingTree
Solve → 109The kth Factor of nMediumMathNumber Theory
Solve → 110Count Numbers with Unique DigitsMediumMathDynamic ProgrammingBacktracking
Solve → 111Bulb SwitcherMediumMathBrainteaser
Solve → 112Path In Zigzag Labelled Binary TreeMediumMathTreeBinary Tree
Solve → 113Reach a NumberMediumMathBinary Search
Solve → 114Nim GameEasyMathBrainteaserGame Theory
Solve → 115Clumsy FactorialMediumMathStackSimulation
Solve → 116Count Total Number of Colored CellsMediumMath
Solve → 117Alice and Bob Playing Flower GameMediumMath
Solve → 118A Number After a Double ReversalEasyMath
Solve → 119Check if Two Chessboard Squares Have the Same ColorEasyMathString
Solve → 120Maximum Sum of Edge Values in a GraphHardMathGreedyGraph Theory
Solve → 121Minimum Moves to Reach Target in GridHardMath
Solve → 122Sum of k-Mirror NumbersHardMathEnumeration
Solve → 123Find the K-th Character in String Game IIHardMathBit ManipulationRecursion
Solve → 124Orderly QueueHardMathStringSorting
Solve → 125Minimum Cuts to Divide a CircleEasyMathGeometry
Solve → 126Subtract the Product and Sum of Digits of an IntegerEasyMath
Solve → 127Broken CalculatorMediumMathGreedy
Solve → 128Pass the PillowEasyMathSimulation
Solve → 129Super Egg DropHardMathBinary SearchDynamic Programming
Solve → 130Find Closest PersonEasyMath
Solve → 131Find the Winning Player in Coin GameEasyMathSimulationGame Theory
Solve → 132Robot Bounded In CircleMediumMathStringSimulation
Solve → 133Water BottlesEasyMathSimulation
Solve → 134Minimum One Bit Operations to Make Integers ZeroHardMathDynamic ProgrammingBit Manipulation
Solve → 135Number of Ways to Divide a Long CorridorHardMathStringDynamic Programming
Solve → 136Nth DigitMediumMathBinary Search
Solve → 137Count Square Sum TriplesEasyMathEnumeration
Solve → 138Mirror Distance of an IntegerEasyMath
Solve → 139Reverse IntegerMediumMath
Solve → 140Palindrome NumberEasyMath
Solve → 141Climbing StairsEasyMathDynamic ProgrammingMemoization
Solve → 142Sqrt(x)EasyMathBinary Search
Solve → 143Pow(x, n)MediumMathRecursion
Solve → 144Unique PathsMediumMathDynamic ProgrammingCombinatorics
Solve → 145Add BinaryEasyMathStringBit Manipulation
Solve → 146Fibonacci NumberEasyMathDynamic ProgrammingRecursion
Solve → 147Factorial Trailing ZeroesMediumMath
Solve → 148Power of TwoEasyMathBit ManipulationRecursion
Solve → 149Divide Two IntegersMediumMathBit Manipulation
Solve → 150Add DigitsEasyMathSimulationNumber Theory
Solve → 151Next Greater Element IIIMediumMathTwo PointersString
Solve → 152Arranging CoinsEasyMathBinary Search
Solve → 153Perfect SquaresMediumMathDynamic ProgrammingBreadth-First Search
Solve → 154Fizz BuzzEasyMathStringSimulation
Solve → 156Number of Digit OneHardMathDynamic ProgrammingRecursion
Solve → 157Basic CalculatorHardMathStringStack
Solve → 158Count Good NumbersMediumMathRecursion
Solve → 159Maximum SwapMediumMathGreedy
Solve → 160Basic Calculator IIMediumMathStringStack
Solve → 161Path In Zigzag Labelled Binary TreeMediumMathTreeBinary Tree
Solve → 162Power of ThreeEasyMathRecursion
Solve → 163Multiply StringsMediumMathStringSimulation
Solve → 164Different Ways to Add ParenthesesMediumMathStringDynamic Programming
Solve → 165Sum of Two IntegersMediumMathBit Manipulation
Solve → 166Greatest Common Divisor of StringsEasyMathString
Solve → 167Permutation SequenceHardMathRecursion
Solve → 169Sum of Square NumbersMediumMathTwo PointersBinary Search
Solve → 170Excel Sheet Column TitleEasyMathString
Solve → 171Elimination GameMediumMathRecursion
Solve → 172Largest Odd Number in StringEasyMathStringGreedy
Solve → 174Valid Perfect SquareEasyMathBinary Search
Solve → 175Count the Number of Arrays with K Matching Adjacent ElementsHardMathCombinatorics
Solve → 176Find the Punishment Number of an IntegerMediumMathBacktracking
Solve → 177Angle Between Hands of a ClockMediumMath
Solve → 178Integer to English WordsHardMathStringRecursion
Solve → 179Convert a Number to HexadecimalEasyMathStringBit Manipulation
Solve → 180Find the Maximum Achievable NumberEasyMath
Solve → 181Expression Add OperatorsHardMathStringBacktracking
Solve → 182Count Symmetric IntegersEasyMathEnumeration
Solve → 183Find the K-th Character in String Game IEasyMathBit ManipulationRecursion
Solve → 184Integer BreakMediumMathDynamic Programming
Solve → 185N-th Tribonacci NumberEasyMathDynamic ProgrammingMemoization
Solve → 186Add StringsEasyMathStringSimulation
Solve → 187Excel Sheet Column NumberEasyMathString
Solve → 188Check if Number is a Sum of Powers of ThreeMediumMath
Solve → 189Power of FourEasyMathBit ManipulationRecursion
Solve → 190New 21 GameMediumMathDynamic ProgrammingSliding Window
Solve → 191Total Waviness of Numbers in Range IIHardMathDynamic Programming
Solve → 192Gray CodeMediumMathBacktrackingBit Manipulation
Solve → 1932 Keys KeyboardMediumMathDynamic Programming
Solve → 194K-th Symbol in GrammarMediumMathBit ManipulationRecursion
Solve → 195Divisor GameEasyMathDynamic ProgrammingBrainteaser
Solve → 196Smallest Even MultipleEasyMathNumber Theory
Solve → 197Closest Prime Numbers in RangeMediumMathNumber Theory
Solve → 198Divisible and Non-divisible Sums DifferenceEasyMath
Solve → 199Max Difference You Can Get From Changing an IntegerMediumMathGreedy
Solve → 200Find the K-th Character in String Game IIHardMathBit ManipulationRecursion
Solve → 201Maximum 69 NumberEasyMathGreedy
Solve → 202Number of Steps to Reduce a Number to ZeroEasyMathBit Manipulation
Solve → 203Super Egg DropHardMathBinary SearchDynamic Programming
Solve → 204Subtract the Product and Sum of Digits of an IntegerEasyMath
Solve → 205Concatenation of Consecutive Binary NumbersMediumMathBit ManipulationSimulation
Solve → 206Mirror Distance of an IntegerEasyMath
Solve → 207Guess Number Higher or Lower IIMediumMathDynamic ProgrammingGame Theory
Solve → 208Nth DigitMediumMathBinary Search
Solve → 209Number of ZigZag Arrays IIHardMathDynamic Programming
Solve → 210Unique Binary Search TreesMediumMathDynamic ProgrammingTree
Solve → 211Bulb SwitcherMediumMathBrainteaser
Solve → 212The kth Factor of nMediumMathNumber Theory
Solve → 213Water BottlesEasyMathSimulation
Solve → 214Count Numbers with Unique DigitsMediumMathDynamic ProgrammingBacktracking
Solve → 215Nim GameEasyMathBrainteaserGame Theory
Solve → 216Reach a NumberMediumMathBinary Search
Solve → 217Count Total Number of Colored CellsMediumMath
Solve → 218Maximum Sum of Edge Values in a GraphHardMathGreedyGraph Theory
Solve → 219Clumsy FactorialMediumMathStackSimulation
Solve → 220Sum of k-Mirror NumbersHardMathEnumeration
Solve → 221Orderly QueueHardMathStringSorting
Solve → 222Check if Two Chessboard Squares Have the Same ColorEasyMathString
Solve → 223Minimum Cuts to Divide a CircleEasyMathGeometry
Solve → 224Broken CalculatorMediumMathGreedy
Solve → 225Pass the PillowEasyMathSimulation
Solve → 226Alice and Bob Playing Flower GameMediumMath
Solve → 227Find Closest PersonEasyMath
Solve → 228A Number After a Double ReversalEasyMath
Solve → 229Find the Winning Player in Coin GameEasyMathSimulationGame Theory
Solve → 230Robot Bounded In CircleMediumMathStringSimulation
Solve → 231Minimum Moves to Reach Target in GridHardMath
Solve → 232Minimum One Bit Operations to Make Integers ZeroHardMathDynamic ProgrammingBit Manipulation
Solve → 233Number of Ways to Divide a Long CorridorHardMathStringDynamic Programming
Solve → 234Count Square Sum TriplesEasyMathEnumeration
Solve → 235Soup ServingsMediumMathDynamic ProgrammingProbability and Statistics
Solve → 236Rectangle AreaMediumMathGeometry
Solve → 237GCD of Odd and Even SumsEasyMathNumber Theory
Solve → 238Check Digitorial PermutationMediumMathCounting
Solve → 239Fancy SequenceHardMathDesignSegment Tree
Solve → 240Find the Closest PalindromeHardMathString
Solve → 241Three DivisorsEasyMathEnumerationNumber Theory
Solve →