1Trapping Rain WaterHardArrayTwo PointersDynamic Programming
Solve → 3Group AnagramsMediumArrayHash TableString
Solve → 4House RobberMediumArrayDynamic Programming
Solve → 5Number of IslandsMediumArrayDepth-First SearchBreadth-First Search
Solve → 6Container With Most WaterMediumArrayTwo PointersGreedy
Solve → 7Alien DictionaryHardArrayStringDepth-First Search
Solve → 83SumMediumArrayTwo PointersSorting
Solve → 9Find Pivot IndexEasyArrayPrefix Sum
Solve → 10Find Minimum in Rotated Sorted ArrayMediumArrayBinary Search
Solve → 11First Missing PositiveHardArrayHash Table
Solve → 12Best Time to Buy and Sell StockEasyArrayDynamic Programming
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