1Contiguous ArrayMediumArrayHash TablePrefix Sum
Solve → 2Best Time to Buy and Sell StockEasyArrayDynamic Programming
Solve → 3N-Repeated Element in Size 2N ArrayEasyArrayHash Table
Solve → 4Spiral MatrixMediumArrayMatrixSimulation
Solve → 5N-Repeated Element in Size 2N ArrayEasyArrayHash Table
Solve → 6Best Time to Buy and Sell StockEasyArrayDynamic Programming
Solve → 7Contiguous ArrayMediumArrayHash TablePrefix Sum
Solve → 9Spiral MatrixMediumArrayMatrixSimulation
Solve → 10Find Peak ElementMediumArrayBinary Search
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