1Maximum Genetic Difference QueryHardSolve → 2Minimum Total Space Wasted With K Resizing OperationsMediumSolve → 4Minimum Cost to Buy ApplesMediumSolve → 5Maximum XOR of Two Non-Overlapping SubtreesHardSolve → 6Difference Between Maximum and Minimum Price SumHardSolve → 7Sum of Remoteness of All CellsMediumSolve → 8Maximum Value of an Ordered Triplet IIMediumSolve → 9Maximum Value of an Ordered Triplet IEasySolve → 11Count the Number of Square-Free SubsetsMediumSolve → 12Furthest Building You Can ReachMediumSolve → 13Queens That Can Attack the KingMediumSolve → 14Minimum Time Visiting All PointsEasySolve → 15Make the XOR of All Segments Equal to ZeroHardSolve → 16Minimum XOR Sum of Two ArraysHardSolve → 17Minimum Operations to Form Subsequence With Target SumHardSolve → 18Maximum Segment Sum After RemovalsHardSolve → 19Trapping Rain Water IIHardSolve → 20Time Needed to Inform All EmployeesMediumSolve → 21Kth Smallest Number in Multiplication TableHardSolve → 22Russian Doll EnvelopesHardSolve → 23Find Maximum Non-decreasing Array LengthHardSolve → 24Queue Reconstruction by HeightMediumSolve → 25Most Stones Removed with Same Row or ColumnMediumSolve → 26The Number of Good SubsetsHardSolve → 30Minimum Number of Valid Strings to Form Target IMediumSolve → 31Recover Binary Search TreeMediumSolve → 32Sliding Window MaximumHardSolve →