LeetCode The Hard Way

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2015 problems

ProblemDifficultyFrequency Topics
4063. Longest Subarray Divisible by K with At Most One Negation IMedium5%
ArrayHash TablePrefix Sum
Tree NodeMedium5%
Database
970. Powerful IntegersMedium5%
Hash TableMathEnumeration
774. Minimize Max Distance to Gas StationHard5%
ArrayBinary Search
2177. Find Three Consecutive Integers That Sum to a Given NumberMedium5%
MathSimulation
1541. Minimum Insertions to Balance a Parentheses StringMedium5%
StringStackGreedyBracket Sequences
Function CompositionEasy5%
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1486. XOR Operation in an ArrayEasy5%
MathBit Manipulation
2241. Design an ATM MachineMedium5%
ArrayGreedyDesign
2897. Apply Operations on Array to Maximize Sum of SquaresHard5%
ArrayHash TableGreedyBit Manipulation
3727. Maximum Alternating Sum of SquaresMedium5%
ArrayGreedySorting
2913. Subarrays Distinct Element Sum of Squares IEasy5%
ArrayHash TableBinary Indexed TreeSegment Tree
2712. Minimum Cost to Make All Characters EqualMedium5%
StringDynamic ProgrammingGreedy
3886. Sum of Sortable IntegersHard5%
ArrayMathSortingEnumeration
3208. Alternating Groups IIMedium5%
ArraySliding Window
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