1Number of IslandsMediumArrayDepth-First SearchBreadth-First Search
Solve → 2Random Pick with WeightMediumArrayMathBinary Search
Solve → 3Maximum GapMediumArraySortingBucket Sort
Solve → 4Number of Visible People in a QueueHardArrayStackMonotonic Stack
Solve → 5Random Pick with WeightMediumArrayMathBinary Search
Solve → 6Number of IslandsMediumArrayDepth-First SearchBreadth-First Search
Solve → 7Minimum Number of Refueling StopsHardArrayDynamic ProgrammingGreedy
Solve → 8Maximum GapMediumArraySortingBucket Sort
Solve → 9Max Points on a LineHardArrayHash TableMath
Solve → 10Meeting Rooms IIMediumArrayTwo PointersGreedy
Solve → 11Number of IslandsMediumArrayDepth-First SearchBreadth-First Search
Solve → 12Minimum Area RectangleMediumArrayHash TableMath
Solve → 13Design Excel Sum FormulaHardArrayHash TableString
Solve → 14Design Tic-Tac-ToeMediumArrayHash TableDesign
Solve → 15Divide Array in Sets of K Consecutive NumbersMediumArrayHash TableGreedy
Solve → 16Shortest Distance from All BuildingsHardArrayBreadth-First SearchMatrix
Solve → 17Find Peak ElementMediumArrayBinary Search
Solve → 18Text JustificationHardArrayStringSimulation
Solve → 19Largest Rectangle in HistogramHardArrayStackMonotonic Stack
Solve → 20Max Points on a LineHardArrayHash TableMath
Solve → 21Number of IslandsMediumArrayDepth-First SearchBreadth-First Search
Solve → 22Random Pick with WeightMediumArrayMathBinary Search
Solve → 23Meeting Rooms IIMediumArrayTwo PointersGreedy
Solve → 24Number of Visible People in a QueueHardArrayStackMonotonic Stack
Solve → 25Design Tic-Tac-ToeMediumArrayHash TableDesign
Solve → 26Shortest Distance from All BuildingsHardArrayBreadth-First SearchMatrix
Solve → 27Design Excel Sum FormulaHardArrayHash TableString
Solve → 28Minimum Area RectangleMediumArrayHash TableMath
Solve → 29Minimum Number of Refueling StopsHardArrayDynamic ProgrammingGreedy
Solve → 30Divide Array in Sets of K Consecutive NumbersMediumArrayHash TableGreedy
Solve → 31Find Peak ElementMediumArrayBinary Search
Solve → 32Text JustificationHardArrayStringSimulation
Solve → 33Largest Rectangle in HistogramHardArrayStackMonotonic Stack
Solve → 34Path With Minimum EffortMediumArrayBinary SearchDepth-First Search
Solve → 35Alien DictionaryHardArrayStringDepth-First Search
Solve → 36Maximum Earnings From TaxiMediumArrayHash TableBinary Search
Solve → 37Range Sum Query 2D - ImmutableMediumArrayDesignMatrix
Solve → 38Number of Islands IIHardArrayHash TableUnion-Find
Solve → 39Car FleetMediumArrayStackSorting
Solve → 40Maximum GapMediumArraySortingBucket Sort
Solve →