1Block Placement QueriesHardArrayBinary SearchBinary Indexed Tree
Solve → 2Min Cost to Connect All PointsMediumArrayUnion-FindGraph Theory
Solve → 3Successful Pairs of Spells and PotionsMediumArrayTwo PointersBinary Search
Solve → 4Block Placement QueriesHardArrayBinary SearchBinary Indexed Tree
Solve → 5Successful Pairs of Spells and PotionsMediumArrayTwo PointersBinary Search
Solve → 6Min Cost to Connect All PointsMediumArrayUnion-FindGraph Theory
Solve → 7Best Time to Buy and Sell StockEasyArrayDynamic Programming
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