LeetCode The Hard Way

Bloomberg

1239 problems

ProblemDifficultyFrequency Topics
1611. Minimum One Bit Operations to Make Integers ZeroHard8.3%
MathDynamic ProgrammingBit ManipulationRecursionMemoization
1240. Tiling a Rectangle with the Fewest SquaresHard8.3%
Backtracking
Design Tic-Tac-ToeMedium8.3%
ArrayHash TableDesignMatrixSimulation
1948. Delete Duplicate Folders in SystemHard8.3%
ArrayHash TableStringDepth-First SearchTrieSortingHash Function
768. Max Chunks To Make Sorted IIHard8.3%
ArrayStackGreedySortingMonotonic Stack
3234. Count the Number of Substrings With Dominant OnesMedium8.3%
StringEnumeration
1437. Check If All 1's Are at Least Length K Places AwayEasy8.3%
Array
1-bit and 2-bit CharactersEasy8.3%
Array
623. Add One Row to TreeMedium8.3%
TreeDepth-First SearchBreadth-First SearchBinary Tree
2154. Keep Multiplying Found Values by TwoEasy8.3%
ArrayHash TableSortingSimulation
880. Decoded String at IndexMedium8.3%
StringStack
3006. Find Beautiful Indices in the Given Array IMedium8.3%
Two PointersStringBinary SearchRolling HashString MatchingHash FunctionZ AlgorithmKnuth–Morris–Pratt AlgorithmBoyer–Moore String-Search Algorithm
1015. Smallest Integer Divisible by KMedium8.3%
Hash TableMathPigeonhole Principle
2141. Maximum Running Time of N ComputersHard8.3%
ArrayBinary SearchGreedySorting
759. Employee Free TimeHard8.3%
ArraySweep LineSortingHeap (Priority Queue)
3432. Count Partitions with Even Sum DifferenceEasy8.3%
ArrayMathPrefix Sum
Closest Binary Search Tree ValueEasy8.3%
Binary SearchTreeDepth-First SearchBinary Search TreeBinary Tree
Tree NodeMedium8.3%
Database
Student Attendance Record IIHard8.3%
Dynamic Programming
1386. Cinema Seat AllocationMedium8.3%
ArrayHash TableGreedyBit Manipulation
2551. Put Marbles in BagsHard8.3%
ArrayGreedySortingHeap (Priority Queue)
3623. Count Number of Trapezoids IMedium8.3%
ArrayHash TableMathGeometry
3433. Count Mentions Per UserMedium8.3%
ArrayMathSortingSimulation
2147. Number of Ways to Divide a Long CorridorHard8.3%
MathStringDynamic Programming
3484. Design SpreadsheetMedium8.3%
ArrayHash TableStringDesignMatrix
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