1Find the Maximum Sum of Node ValuesHardArrayDynamic ProgrammingGreedy
Solve → 2Maximum Subtree of the Same ColorMediumArrayDynamic ProgrammingTree
Solve → 3Group AnagramsMediumArrayHash TableString
Solve → 4Best Time to Buy and Sell StockEasyArrayDynamic Programming
Solve → 5Maximum Profit From Trading StocksMediumArrayDynamic Programming
Solve → 6Number of IslandsMediumArrayDepth-First SearchBreadth-First Search
Solve → 8Missing NumberEasyArrayHash TableMath
Solve → 9Find the Maximum Sum of Node ValuesHardArrayDynamic ProgrammingGreedy
Solve → 10Maximum Subtree of the Same ColorMediumArrayDynamic ProgrammingTree
Solve → 11Group AnagramsMediumArrayHash TableString
Solve → 12Best Time to Buy and Sell StockEasyArrayDynamic Programming
Solve → 13Maximum Profit From Trading StocksMediumArrayDynamic Programming
Solve → 14Number of IslandsMediumArrayDepth-First SearchBreadth-First Search
Solve → 15Two SumEasyArrayHash Table
Solve → 16Missing NumberEasyArrayHash TableMath
Solve → 17Find the Duplicate NumberMediumArrayTwo PointersBinary Search
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