902.Numbers At Most N Given Digit Set
HardArrayBinary SearchDynamic Programming45.9% acceptance4 companiesVideo
650 results
906.Super Palindromes
HardEnumerationMath40.5% acceptance1 companyVideo
908.Smallest Range I
EasyArrayMath74.0% acceptance3 companiesVideo
910.Smallest Range II
MediumArrayGreedyMath38.4% acceptance3 companiesVideo
913.Cat and Mouse
HardDynamic ProgrammingGame TheoryGraph36.2% acceptance3 companiesVideo
914.X of a Kind in a Deck of Cards
EasyArrayCountingHash Table30.4% acceptance2 companiesVideo
920.Number of Music Playlists
HardCombinatoricsDynamic ProgrammingMath60.3% acceptance2 companiesVideo
927.Three Equal Parts
HardArrayMath41.9% acceptance2 companiesVideo
932.Beautiful Array
MediumArrayDivide and ConquerMath70.7% acceptance4 companiesVideo
939.Minimum Area Rectangle
MediumArrayGeometryHash Table55.4% acceptance8 companiesVideo
952.Largest Component Size by Common Factor
HardArrayHash TableMath43.8% acceptance2 companiesVideo
957.Prison Cells After N Days
MediumArrayBit ManipulationHash Table39.0% acceptance1 companyVideo
963.Minimum Area Rectangle II
MediumArrayGeometryMath55.9% acceptance2 companiesVideo
964.Least Operators to Express Number
HardDynamic ProgrammingMathMemoization48.3% acceptance1 companyVideo
970.Powerful Integers
MediumEnumerationHash TableMath44.5% acceptanceVideo
972.Equal Rational Numbers
HardMathString47.9% acceptance2 companiesVideo
973.K Closest Points to Origin
MediumArrayDivide and ConquerGeometry69.4% acceptance17 companiesVideo
976.Largest Perimeter Triangle
EasyArrayGreedyMath62.1% acceptance5 companiesVideo
989.Add to Array-Form of Integer
EasyArrayMath45.6% acceptance4 companiesVideo
991.Broken Calculator
MediumGreedyMath56.6% acceptance5 companiesVideo
996.Number of Squareful Arrays
HardArrayBacktrackingBit Manipulation51.9% acceptance2 companiesVideo
1006.Clumsy Factorial
MediumMathSimulationStack61.8% acceptance4 companiesVideo
1012.Numbers With Repeated Digits
HardDynamic ProgrammingMath48.9% acceptance2 companiesVideo
1015.Smallest Integer Divisible by K
MediumHash TableMath54.4% acceptance6 companiesVideo
1017.Convert to Base -2
MediumMath63.6% acceptance4 companies
1025.Divisor Game
EasyBrainteaserDynamic ProgrammingGame Theory72.3% acceptance7 companiesVideo
1030.Matrix Cells in Distance Order
EasyArrayGeometryMath74.6% acceptance1 companyVideo
1033.Moving Stones Until Consecutive
MediumBrainteaserMath52.8% acceptance1 companyVideo
1037.Valid Boomerang
EasyArrayGeometryMath40.5% acceptance2 companiesVideo
1040.Moving Stones Until Consecutive II
MediumArrayMathSorting59.4% acceptance1 companyVideo
1041.Robot Bounded In Circle
MediumMathSimulationString56.6% acceptance11 companiesVideo
1056.Confusing Number
EasyMath49.8% acceptance1 companyPremium elsewhere, free hereVideo
1058.Minimize Rounding Error to Meet Target
MediumArrayGreedyMath45.9% acceptance1 companyPremium elsewhere, free hereVideo
1067.Digit Count in Range
HardDynamic ProgrammingMath46.4% acceptance1 companyPremium elsewhere, free hereVideo
1071.Greatest Common Divisor of Strings
EasyMathString54.1% acceptance7 companiesVideo
1073.Adding Two Negabinary Numbers
MediumArrayMath38.3% acceptance1 companyVideo
1085.Sum of Digits in the Minimum Number
EasyArrayMath76.6% acceptance1 companyPremium elsewhere, free hereVideo
1088.Confusing Number II
HardBacktrackingMath47.1% acceptance1 companyPremium elsewhere, free hereVideo
1093.Statistics from a Large Sample
MediumArrayMathProbability and Statistics43.6% acceptance1 companyVideo
1103.Distribute Candies to People
EasyMathSimulation68.1% acceptanceVideo
1104.Path In Zigzag Labelled Binary Tree
MediumBinary TreeMathTree75.9% acceptance2 companiesVideo
1118.Number of Days in a Month
EasyMath59.4% acceptance1 companyPremium elsewhere, free hereVideo
1131.Maximum of Absolute Value Expression
MediumArrayMath49.0% acceptance2 companiesVideo
1134.Armstrong Number
EasyMath77.8% acceptance1 companyPremium elsewhere, free hereVideo
1137.N-th Tribonacci Number
EasyDynamic ProgrammingMathMemoization63.2% acceptance7 companiesVideo
1140.Stone Game II
MediumArrayDynamic ProgrammingGame Theory75.8% acceptance5 companiesVideo
1154.Day of the Year
EasyMathString50.3% acceptance3 companiesVideo
1175.Prime Arrangements
EasyMath63.3% acceptance1 companyVideo
1180.Count Substrings with Only One Distinct Letter
EasyMathString80.9% acceptance1 companyPremium elsewhere, free hereVideo
1185.Day of the Week
EasyMath59.6% acceptance3 companiesVideo
Showing 151–200 of 650
How to use these solutions
Each solution breaks the problem into approaches, usually from brute force to the best one, and explains why each works. Code comes in Python, Java, C++ and other languages. Knowing why an approach works matters more in an interview than remembering the code.
- Try the problem first. Give it at least 20 minutes before you open the solution.
- Read every approach. The brute force shows you the problem; the faster ones show the pattern.
- Check the complexity. Note the time and space of each approach and what makes the difference.
- Write it yourself. Close the solution and code it from memory in the editor.
- Come back in a week. Solving it again later is what makes the pattern stick.