1Average Waiting TimeMediumArraySimulation
Solve → 2Find First and Last Position of Element in Sorted ArrayMediumArrayBinary Search
Solve → 3Squares of a Sorted ArrayEasyArrayTwo PointersSorting
Solve → 4Average Waiting TimeMediumArraySimulation
Solve → 5Find First and Last Position of Element in Sorted ArrayMediumArrayBinary Search
Solve → 6Squares of a Sorted ArrayEasyArrayTwo PointersSorting
Solve → 7Average Waiting TimeMediumArraySimulation
Solve → 8Check if Every Row and Column Contains All NumbersEasyArrayHash TableMatrix
Solve → 9Minimum Number of Arrows to Burst BalloonsMediumArrayGreedySorting
Solve → 10Maximum Number of Events That Can Be AttendedMediumArrayGreedySorting
Solve → 11Search Insert PositionEasyArrayBinary Search
Solve → 12Valid SudokuMediumArrayHash TableMatrix
Solve → 13Non-overlapping IntervalsMediumArrayDynamic ProgrammingGreedy
Solve → 14Merge IntervalsMediumArraySorting
Solve → 15Best Time to Buy and Sell StockEasyArrayDynamic Programming
Solve → 16Word Search IIHardArrayStringBacktracking
Solve → 17Squares of a Sorted ArrayEasyArrayTwo PointersSorting
Solve → 18Find First and Last Position of Element in Sorted ArrayMediumArrayBinary Search
Solve → 19Check if Every Row and Column Contains All NumbersEasyArrayHash TableMatrix
Solve → 20Find First and Last Position of Element in Sorted ArrayMediumArrayBinary Search
Solve → 21Squares of a Sorted ArrayEasyArrayTwo PointersSorting
Solve → 22Best Time to Buy and Sell StockEasyArrayDynamic Programming
Solve → 23Minimum Number of Arrows to Burst BalloonsMediumArrayGreedySorting
Solve → 24Maximum Number of Events That Can Be AttendedMediumArrayGreedySorting
Solve → 25Search Insert PositionEasyArrayBinary Search
Solve → 26Valid SudokuMediumArrayHash TableMatrix
Solve → 27Non-overlapping IntervalsMediumArrayDynamic ProgrammingGreedy
Solve → 28Merge IntervalsMediumArraySorting
Solve → 29Word Search IIHardArrayStringBacktracking
Solve → 30Average Waiting TimeMediumArraySimulation
Solve →