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HomeLeetCode ProblemsMath

Math Problems

528 Math LeetCode problems · Solve with AI-powered hints & step-by-step explanations.

2Add Two NumbersMedium7Reverse IntegerMedium9Palindrome NumberEasy12Integer to RomanMedium13Roman to IntegerEasy29Divide Two IntegersMedium43Multiply StringsMedium48Rotate ImageMedium50Pow(x, n)Medium60Permutation SequenceHard62Unique PathsMedium66Plus OneEasy67Add BinaryEasy69Sqrt(x)Easy70Climbing StairsEasy89Gray CodeMedium96Unique Binary Search TreesMedium149Max Points on a LineHard150Evaluate Reverse Polish NotationMedium166Fraction to Recurring DecimalMedium168Excel Sheet Column TitleEasy171Excel Sheet Column NumberEasy172Factorial Trailing ZeroesMedium189Rotate ArrayMedium202Happy NumberEasy204Count PrimesMedium223Rectangle AreaMedium224Basic CalculatorHard227Basic Calculator IIMedium231Power of TwoEasy233Number of Digit OneHard241Different Ways to Add ParenthesesMedium258Add DigitsEasy263Ugly NumberEasy264Ugly Number IIMedium268Missing NumberEasy273Integer to English WordsHard279Perfect SquaresMedium282Expression Add OperatorsHard292Nim GameEasy313Super Ugly NumberMedium319Bulb SwitcherMedium326Power of ThreeEasy335Self CrossingHard342Power of FourEasy343Integer BreakMedium357Count Numbers with Unique DigitsMedium365Water and Jug ProblemMedium367Valid Perfect SquareEasy368Largest Divisible SubsetMedium371Sum of Two IntegersMedium372Super PowMedium375Guess Number Higher or Lower IIMedium380Insert Delete GetRandom O(1)Medium381Insert Delete GetRandom O(1) - Duplicates allowedHard382Linked List Random NodeMedium384Shuffle an ArrayMedium390Elimination GameMedium391Perfect RectangleHard396Rotate FunctionMedium398Random Pick IndexMedium400Nth DigitMedium405Convert a Number to HexadecimalEasy412Fizz BuzzEasy415Add StringsEasy423Reconstruct Original Digits from EnglishMedium441Arranging CoinsEasy445Add Two Numbers IIMedium447Number of BoomerangsMedium453Minimum Moves to Equal Array ElementsMedium458Poor PigsHard462Minimum Moves to Equal Array Elements IIMedium464Can I WinMedium470Implement Rand10() Using Rand7()Medium477Total Hamming DistanceMedium478Generate Random Point in a CircleMedium479Largest Palindrome ProductHard483Smallest Good BaseHard486Predict the WinnerMedium492Construct the RectangleEasy497Random Point in Non-overlapping RectanglesMedium504Base 7Easy507Perfect NumberEasy509Fibonacci NumberEasy519Random Flip MatrixMedium523Continuous Subarray SumMedium528Random Pick with WeightMedium537Complex Number MultiplicationMedium539Minimum Time DifferenceMedium553Optimal DivisionMedium556Next Greater Element IIIMedium564Find the Closest PalindromeHard587Erect the FenceHard592Fraction Addition and SubtractionMedium593Valid SquareMedium598Range Addition IIEasy628Maximum Product of Three NumbersEasy633Sum of Square NumbersMedium640Solve the EquationMedium6502 Keys KeyboardMedium667Beautiful Arrangement IIMedium668Kth Smallest Number in Multiplication TableHard670Maximum SwapMedium672Bulb Switcher IIMedium67924 GameHard710Random Pick with BlacklistHard728Self Dividing NumbersEasy738Monotone Increasing DigitsMedium754Reach a NumberMedium762Prime Number of Set Bits in Binary RepresentationEasy770Basic Calculator IVHard775Global and Local InversionsMedium779K-th Symbol in GrammarMedium780Reaching PointsHard781Rabbits in ForestMedium782Transform to ChessboardHard788Rotated DigitsMedium789Escape The GhostsMedium793Preimage Size of Factorial Zeroes FunctionHard805Split Array With Same AverageHard808Soup ServingsMedium810Chalkboard XOR GameHard812Largest Triangle AreaEasy829Consecutive Numbers SumHard836Rectangle OverlapEasy837New 21 GameMedium840Magic Squares In GridMedium843Guess the WordHard858Mirror ReflectionMedium866Prime PalindromeMedium869Reordered Power of 2Medium877Stone GameMedium878Nth Magical NumberHard883Projection Area of 3D ShapesEasy887Super Egg DropHard891Sum of Subsequence WidthsHard892Surface Area of 3D ShapesEasy899Orderly QueueHard902Numbers At Most N Given Digit SetHard906Super PalindromesHard908Smallest Range IEasy910Smallest Range IIMedium913Cat and MouseHard914X of a Kind in a Deck of CardsEasy920Number of Music PlaylistsHard927Three Equal PartsHard932Beautiful ArrayMedium939Minimum Area RectangleMedium952Largest Component Size by Common FactorHard957Prison Cells After N DaysMedium963Minimum Area Rectangle IIMedium964Least Operators to Express NumberHard970Powerful IntegersMedium972Equal Rational NumbersHard973K Closest Points to OriginMedium976Largest Perimeter TriangleEasy989Add to Array-Form of IntegerEasy991Broken CalculatorMedium996Number of Squareful ArraysHard1006Clumsy FactorialMedium1012Numbers With Repeated DigitsHard1015Smallest Integer Divisible by KMedium1017Convert to Base -2Medium1025Divisor GameEasy1030Matrix Cells in Distance OrderEasy1033Moving Stones Until ConsecutiveMedium1037Valid BoomerangEasy1040Moving Stones Until Consecutive IIMedium1041Robot Bounded In CircleMedium1071Greatest Common Divisor of StringsEasy1073Adding Two Negabinary NumbersMedium1093Statistics from a Large SampleMedium1103Distribute Candies to PeopleEasy1104Path In Zigzag Labelled Binary TreeMedium1131Maximum of Absolute Value ExpressionMedium1137N-th Tribonacci NumberEasy1140Stone Game IIMedium1154Day of the YearEasy1175Prime ArrangementsEasy1185Day of the WeekEasy1201Ugly Number IIIMedium1217Minimum Cost to Move Chips to The Same PositionEasy1227Airplane Seat Assignment ProbabilityMedium1232Check If It Is a Straight LineEasy1237Find Positive Integer Solution for a Given EquationMedium1238Circular Permutation in Binary RepresentationMedium1247Minimum Swaps to Make Strings EqualMedium1248Count Number of Nice SubarraysMedium1250Check If It Is a Good ArrayHard1252Cells with Odd Values in a MatrixEasy1266Minimum Time Visiting All PointsEasy1276Number of Burgers with No Waste of IngredientsMedium1281Subtract the Product and Sum of Digits of an IntegerEasy1290Convert Binary Number in a Linked List to IntegerEasy1295Find Numbers with Even Number of DigitsEasy1304Find N Unique Integers Sum up to ZeroEasy1307Verbal Arithmetic PuzzleHard1317Convert Integer to the Sum of Two No-Zero IntegersEasy1323Maximum 69 NumberEasy1330Reverse Subarray To Maximize Array ValueHard1342Number of Steps to Reduce a Number to ZeroEasy1344Angle Between Hands of a ClockMedium1352Product of the Last K NumbersMedium1359Count All Valid Pickup and Delivery OptionsHard1360Number of Days Between Two DatesEasy1362Closest DivisorsMedium1363Largest Multiple of ThreeHard1390Four DivisorsMedium1399Count Largest GroupEasy1401Circle and Rectangle OverlappingMedium1406Stone Game IIIHard1414Find the Minimum Number of Fibonacci Numbers Whose Sum Is KMedium1432Max Difference You Can Get From Changing an IntegerMedium1442Count Triplets That Can Form Two Arrays of Equal XORMedium1447Simplified FractionsMedium1453Maximum Number of Darts Inside of a Circular DartboardHard1467Probability of a Two Boxes Having The Same Number of Distinct BallsHard1478Allocate MailboxesHard1486XOR Operation in an ArrayEasy1492The kth Factor of nMedium1510Stone Game IVHard1512Number of Good PairsEasy1513Number of Substrings With Only 1sMedium1515Best Position for a Service CentreHard1518Water BottlesEasy1523Count Odd Numbers in an Interval RangeEasy1524Number of Sub-arrays With Odd SumMedium1551Minimum Operations to Make Array EqualMedium1561Maximum Number of Coins You Can GetMedium1563Stone Game VHard1569Number of Ways to Reorder Array to Get Same BSTHard1573Number of Ways to Split a StringMedium1577Number of Ways Where Square of Number Is Equal to Product of Two NumbersMedium1588Sum of All Odd Length SubarraysEasy1610Maximum Number of Visible PointsHard1621Number of Sets of K Non-Overlapping Line SegmentsMedium1622Fancy SequenceHard1627Graph Connectivity With ThresholdHard1641Count Sorted Vowel StringsMedium1643Kth Smallest InstructionsHard1648Sell Diminishing-Valued Colored BallsMedium1680Concatenation of Consecutive Binary NumbersMedium1685Sum of Absolute Differences in a Sorted ArrayMedium1686Stone Game VIMedium1688Count of Matches in TournamentEasy1690Stone Game VIIMedium1716Calculate Money in Leetcode BankEasy1728Cat and Mouse IIHard1735Count Ways to Make Array With ProductHard1739Building BoxesHard1742Maximum Number of Balls in a BoxEasy1753Maximum Score From Removing StonesMedium1759Count Number of Homogenous SubstringsMedium1766Tree of CoprimesHard1776Car Fleet IIHard1780Check if Number is a Sum of Powers of ThreeMedium1799Maximize Score After N OperationsHard1802Maximum Value at a Given Index in a Bounded ArrayMedium1806Minimum Number of Operations to Reinitialize a PermutationMedium1808Maximize Number of Nice DivisorsHard1812Determine Color of a Chessboard SquareEasy1814Count Nice Pairs in an ArrayMedium1819Number of Different Subsequences GCDsHard1822Sign of the Product of an ArrayEasy1823Find the Winner of the Circular GameMedium1828Queries on Number of Points Inside a CircleMedium1830Minimum Number of Operations to Make String SortedHard1835Find XOR Sum of All Pairs Bitwise ANDHard1837Sum of Digits in Base KEasy1840Maximum Building HeightHard1860Incremental Memory LeakMedium1862Sum of Floored PairsHard1863Sum of All Subset XOR TotalsEasy1866Number of Ways to Rearrange Sticks With K Sticks VisibleHard1872Stone Game VIIIHard1878Get Biggest Three Rhombus Sums in a GridMedium1884Egg Drop With 2 Eggs and N FloorsMedium1896Minimum Cost to Change the Final Value of ExpressionHard1903Largest Odd Number in StringEasy1904The Number of Full Rounds You Have PlayedMedium1916Count Ways to Build Rooms in an Ant ColonyHard1922Count Good NumbersMedium1925Count Square Sum TriplesEasy1927Sum GameMedium1952Three DivisorsEasy1954Minimum Garden Perimeter to Collect Enough ApplesMedium1969Minimum Non-Zero Product of the Array ElementsMedium1979Find Greatest Common Divisor of ArrayEasy1994The Number of Good SubsetsHard1998GCD Sort of an ArrayHard2001Number of Pairs of Interchangeable RectanglesMedium2019The Score of Students Solving Math ExpressionHard2028Find Missing ObservationsMedium2029Stone Game IXMedium2033Minimum Operations to Make a Uni-Value GridMedium2038Remove Colored Pieces if Both Neighbors are the Same ColorMedium2048Next Greater Numerically Balanced NumberMedium2063Vowels of All SubstringsMedium2081Sum of k-Mirror NumbersHard2101Detonate the Maximum BombsMedium2110Number of Smooth Descent Periods of a StockMedium2117Abbreviating the Product of a RangeHard2119A Number After a Double ReversalEasy2125Number of Laser Beams in a BankMedium2139Minimum Moves to Reach Target ScoreMedium2147Number of Ways to Divide a Long CorridorHard2160Minimum Sum of Four Digit Number After Splitting DigitsEasy2162Minimum Cost to Set Cooking TimeMedium2165Smallest Value of the Rearranged NumberMedium2169Count Operations to Obtain ZeroEasy2177Find Three Consecutive Integers That Sum to a Given NumberMedium2178Maximum Split of Positive Even IntegersMedium2180Count Integers With Even Digit SumEasy2183Count Array Pairs Divisible by KHard2195Append K Integers With Minimal SumMedium2197Replace Non-Coprime Numbers in ArrayHard2217Find Palindrome With Fixed LengthMedium2221Find Triangular Sum of an ArrayMedium2235Add Two IntegersEasy2240Number of Ways to Buy Pens and PencilsMedium2249Count Lattice Points Inside a CircleMedium2266Count Number of TextsMedium2269Find the K-Beauty of a NumberEasy2280Minimum Lines to Represent a Line ChartMedium2310Sum of Numbers With Units Digit KMedium2317Maximum XOR After Operations Medium2338Count the Number of Ideal ArraysHard2344Minimum Deletions to Make Array DivisibleHard2348Number of Zero-Filled SubarraysMedium2358Maximum Number of Groups Entering a CompetitionMedium2364Count Number of Bad PairsMedium2366Minimum Replacements to Sort the ArrayHard2376Count Special IntegersHard2396Strictly Palindromic NumberMedium2400Number of Ways to Reach a Position After Exactly k StepsMedium2409Count Days Spent TogetherEasy2413Smallest Even MultipleEasy2427Number of Common FactorsEasy2440Create Components With Same ValueHard2442Count Number of Distinct Integers After Reverse OperationsMedium2443Sum of Number and Its ReverseMedium2447Number of Subarrays With GCD Equal to KMedium2455Average Value of Even Numbers That Are Divisible by ThreeEasy2457Minimum Addition to Make Integer BeautifulMedium2469Convert the TemperatureEasy2470Number of Subarrays With LCM Equal to KMedium2481Minimum Cuts to Divide a CircleEasy2485Find the Pivot IntegerEasy2507Smallest Value After Replacing With Sum of Prime FactorsMedium2513Minimize the Maximum of Two ArraysMedium2514Count AnagramsHard2520Count the Digits That Divide a NumberEasy2521Distinct Prime Factors of Product of ArrayMedium2523Closest Prime Numbers in RangeMedium2525Categorize Box According to CriteriaEasy2527Find Xor-Beauty of ArrayMedium2535Difference Between Element Sum and Digit Sum of an ArrayEasy2541Minimum Operations to Make Array Equal IIMedium2543Check if Point Is ReachableHard2544Alternating Digit SumEasy2549Count Distinct Numbers on BoardEasy2550Count Collisions of Monkeys on a PolygonMedium2566Maximum Difference by Remapping a DigitEasy2572Count the Number of Square-Free SubsetsMedium2575Find the Divisibility Array of a StringMedium2578Split With Minimum SumEasy2579Count Total Number of Colored CellsMedium2582Pass the PillowEasy2584Split the Array to Make Coprime ProductsHard2591Distribute Money to Maximum ChildrenEasy2597The Number of Beautiful SubsetsMedium2598Smallest Missing Non-negative Integer After OperationsMedium2600K Items With the Maximum SumEasy2601Prime Subtraction OperationMedium2607Make K-Subarray Sums EqualMedium2614Prime In DiagonalEasy2651Calculate Delayed Arrival TimeEasy2652Sum MultiplesEasy2654Minimum Number of Operations to Make All Array Elements Equal to 1Medium2681Power of HeroesHard2698Find the Punishment Number of an IntegerMedium2709Greatest Common Divisor TraversalHard2719Count of IntegersHard2729Check if The Number is FascinatingEasy2739Total Distance TraveledEasy2745Construct the Longest New StringMedium2748Number of Beautiful PairsEasy2750Ways to Split Array Into Good SubarraysMedium2761Prime Pairs With Target SumMedium2769Find the Maximum Achievable NumberEasy2790Maximum Number of Groups With Increasing LengthHard2806Account Balance After Rounded PurchaseEasy2807Insert Greatest Common Divisors in Linked ListMedium2816Double a Number Represented as a Linked ListMedium2818Apply Operations to Maximize ScoreHard2827Number of Beautiful Integers in the RangeHard2829Determine the Minimum Sum of a k-avoiding ArrayMedium2834Find the Minimum Possible Sum of a Beautiful ArrayMedium2842Count K-Subsequences of a String With Maximum BeautyHard2843 Count Symmetric IntegersEasy2844Minimum Operations to Make a Special NumberMedium2849Determine if a Cell Is Reachable at a Given TimeMedium2851String TransformationHard2862Maximum Element-Sum of a Complete Subset of IndicesHard2864Maximum Odd Binary NumberEasy2867Count Valid Paths in a TreeHard2894Divisible and Non-divisible Sums DifferenceEasy2928Distribute Candies Among Children IEasy2929Distribute Candies Among Children IIMedium2930Number of Strings Which Can Be Rearranged to Contain SubstringMedium2939Maximum Xor ProductMedium2946Matrix Similarity After Cyclic ShiftsEasy2947Count Beautiful Substrings IMedium2949Count Beautiful Substrings IIHard2954Count the Number of Infection SequencesHard2961Double Modular ExponentiationMedium2963Count the Number of Good PartitionsHard2965Find Missing and Repeated ValuesEasy2967Minimum Cost to Make Array EqualindromicMedium2999Count the Number of Powerful IntegersHard3001Minimum Moves to Capture The QueenMedium3012Minimize Length of Array Using OperationsMedium3014Minimum Number of Pushes to Type Word IEasy3021Alice and Bob Playing Flower GameMedium3024Type of TriangleEasy3025Find the Number of Ways to Place People IMedium3027Find the Number of Ways to Place People IIHard3044Most Frequent PrimeMedium3047Find the Largest Area of Square Inside Two RectanglesMedium3079Find the Sum of Encrypted IntegersEasy3084Count Substrings Starting and Ending with Given CharacterMedium3091Apply Operations to Make Sum of Array Greater Than or Equal to kMedium3099Harshad NumberEasy3100Water Bottles IIMedium3101Count Alternating SubarraysMedium3102Minimize Manhattan DistancesHard3115Maximum Prime DifferenceMedium3116Kth Smallest Amount With Single Denomination CombinationHard3128Right TrianglesMedium3153Sum of Digit Differences of All PairsMedium3154Find Number of Ways to Reach the K-th StairHard3178Find the Child Who Has the Ball After K SecondsEasy3179Find the N-th Value After K SecondsMedium3190Find Minimum Operations to Make All Elements Divisible by ThreeEasy3222Find the Winning Player in Coin GameEasy3227Vowels Game in a StringMedium3232Find if Digit Game Can Be WonEasy3233Find the Count of Numbers Which Are Not SpecialMedium3235Check if the Rectangle Corner Is ReachableHard3250Find the Count of Monotonic Pairs IHard3251Find the Count of Monotonic Pairs IIHard3260Find the Largest Palindrome Divisible by KHard3264Final Array State After K Multiplication Operations IEasy3270Find the Key of the NumbersEasy3272Find the Count of Good IntegersHard3274Check if Two Chessboard Squares Have the Same ColorEasy3280Convert Date to BinaryEasy3283Maximum Number of Moves to Kill All PawnsHard3289The Two Sneaky Numbers of DigitvilleEasy3296Minimum Number of Seconds to Make Mountain Height ZeroMedium3300Minimum Element After Replacement With Digit SumEasy3304Find the K-th Character in String Game IEasy3307Find the K-th Character in String Game IIHard3312Sorted GCD Pair QueriesHard3317Find the Number of Possible Ways for an EventHard3326Minimum Division Operations to Make Array Non DecreasingMedium3334Find the Maximum Factor Score of ArrayMedium3335Total Characters in String After Transformations IMedium3336Find the Number of Subsequences With Equal GCDHard3337Total Characters in String After Transformations IIHard3343Count Number of Balanced PermutationsHard3345Smallest Divisible Digit Product IEasy3348Smallest Divisible Digit Product IIHard3352Count K-Reducible Numbers Less Than NHard3360Stone Removal GameEasy3370Smallest Number With All Set BitsEasy3377Digit Operations to Make Two Integers EqualMedium3378Count Connected Components in LCM GraphHard3380Maximum Area Rectangle With Point Constraints IMedium3382Maximum Area Rectangle With Point Constraints IIHard3395Subsequences with a Unique Middle Mode IHard3404Count Special SubsequencesMedium3405Count the Number of Arrays with K Matching Adjacent ElementsHard3411Maximum Subarray With Equal ProductsEasy3426Manhattan Distances of All Arrangements of PiecesHard3428Maximum and Minimum Sums of at Most Size K SubsequencesMedium3430Maximum and Minimum Sums of at Most Size K SubarraysHard3432Count Partitions with Even Sum DifferenceEasy3433Count Mentions Per UserMedium3443Maximum Manhattan Distance After K ChangesMedium3444Minimum Increments for Target Multiples in an ArrayHard3461Check If Digits Are Equal in String After Operations IEasy3463Check If Digits Are Equal in String After Operations IIHard3468Find the Number of Copy ArraysMedium3470Permutations IVHard3492Maximum Containers on a ShipEasy3495Minimum Operations to Make Array Elements ZeroHard3505Minimum Operations to Make Elements Within K Subarrays EqualHard3512Minimum Operations to Make Array Sum Divisible by KEasy3513Number of Unique XOR Triplets IMedium3514Number of Unique XOR Triplets IIMedium3516Find Closest PersonEasy3518Smallest Palindromic Rearrangement IIHard3519Count Numbers with Non-Decreasing Digits Hard3524Find X Value of Array IMedium3525Find X Value of Array IIHard3536Maximum Product of Two DigitsEasy3539Find Sum of Array Product of Magical SequencesHard3550Smallest Index With Digit Sum Equal to IndexEasy3556Sum of Largest Prime SubstringsMedium3558Number of Ways to Assign Edge Weights IMedium3559Number of Ways to Assign Edge Weights IIHard3560Find Minimum Log Transportation CostEasy3569Maximize Count of Distinct Primes After SplitHard3574Maximize Subarray GCD ScoreHard3577Count the Number of Computer Unlocking PermutationsMedium3588Find Maximum Area of a TriangleMedium3589Count Prime-Gap Balanced SubarraysMedium3591Check if Any Element Has Prime FrequencyEasy3602Hexadecimal and Hexatrigesimal ConversionEasy3605Minimum Stability Factor of ArrayHard3609Minimum Moves to Reach Target in GridHard3618Split Array by Prime IndicesMedium3621Number of Integers With Popcount-Depth Equal to K IHard3622Check Divisibility by Digit Sum and ProductEasy3623Count Number of Trapezoids IMedium3625Count Number of Trapezoids IIHard3630Partition Array for Maximum XOR and ANDHard
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