LeetCode The Hard Way

Bloomberg

1239 problems

ProblemDifficultyFrequency Topics
Count of Smaller Numbers After SelfHard27.5%
ArrayBinary SearchDivide and ConquerBinary Indexed TreeSegment TreeMerge SortOrdered SetTreap
374. Guess Number Higher or LowerEasy27.5%
Binary SearchInteractive
Repeated Substring PatternEasy27.5%
StringString MatchingZ AlgorithmKnuth–Morris–Pratt Algorithm
Island PerimeterEasy27.5%
ArrayDepth-First SearchBreadth-First SearchMatrix
542. 01 MatrixMedium27.5%
ArrayDynamic ProgrammingBreadth-First SearchMatrix
633. Sum of Square NumbersMedium27.5%
MathTwo PointersBinary Search
Candy CrushMedium27.5%
ArrayTwo PointersMatrixSimulation
981. Time Based Key-Value StoreMedium27.5%
Hash TableStringBinary SearchDesign
1431. Kids With the Greatest Number of CandiesEasy27.5%
Array
1498. Number of Subsequences That Satisfy the Given Sum ConditionMedium27.5%
ArrayTwo PointersBinary SearchSorting
1512. Number of Good PairsEasy27.5%
ArrayHash TableMathCounting
The Number of Employees Which Report to Each EmployeeEasy27.5%
Database
2560. House Robber IVMedium27.5%
ArrayBinary SearchDynamic ProgrammingGreedy
CounterEasy27.5%
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1910. Remove All Occurrences of a SubstringMedium27.5%
StringStackSimulation
Delete Duplicate EmailsEasy27.5%
Database
Product Sales Analysis IEasy27.5%
Database
1295. Find Numbers with Even Number of DigitsEasy27.5%
ArrayMath
1079. Letter Tile PossibilitiesMedium27.5%
Hash TableStringBacktrackingCounting
2094. Finding 3-Digit Even NumbersEasy27.5%
ArrayHash TableRecursionSortingEnumeration
1631. Path With Minimum EffortMedium27.5%
ArrayBinary SearchDepth-First SearchBreadth-First SearchUnion-FindHeap (Priority Queue)MatrixDijkstra's Algorithm
Perfect NumberEasy27.5%
Math
572. Subtree of Another TreeEasy27.5%
TreeDepth-First SearchString MatchingBinary TreeHash Function
Count Binary SubstringsEasy27.5%
Two PointersString
1658. Minimum Operations to Reduce X to ZeroMedium27.5%
ArrayHash TableBinary SearchSliding WindowPrefix Sum
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