LeetCode The Hard Way

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93 problems

ProblemDifficultyFrequency Topics
295. Find Median from Data StreamHard58.7%
Two PointersDesignSortingHeap (Priority Queue)Data Stream
907. Sum of Subarray MinimumsMedium58.7%
ArrayDynamic ProgrammingStackMonotonic Stack
62. Unique PathsMedium58.7%
MathDynamic ProgrammingCombinatorics
850. Rectangle Area IIHard58.7%
ArraySegment TreeSweep LineOrdered Set
72. Edit DistanceMedium52%
StringDynamic Programming
207. Course ScheduleMedium52%
Depth-First SearchBreadth-First SearchGraph TheoryTopological SortDirected Acyclic Graph
2385. Amount of Time for Binary Tree to Be InfectedMedium52%
Hash TableTreeDepth-First SearchBreadth-First SearchBinary Tree
Asteroid CollisionMedium52%
ArrayStackSimulation
939. Minimum Area RectangleMedium52%
ArrayHash TableMathGeometrySorting
1463. Cherry Pickup IIHard52%
ArrayDynamic ProgrammingMatrix
56. Merge IntervalsMedium52%
ArraySortingQuicksort
332. Reconstruct ItineraryHard52%
ArrayStringDepth-First SearchGraph TheorySortingHeap (Priority Queue)Eulerian CircuitEulerian PathSemi-Eulerian Graph
1482. Minimum Number of Days to Make m BouquetsMedium52%
ArrayBinary Search
127. Word LadderHard52%
Hash TableStringBreadth-First SearchBidirectional Search
22. Generate ParenthesesMedium52%
StringDynamic ProgrammingBacktrackingBracket Sequences
Next PermutationMedium52%
ArrayTwo Pointers
1192. Critical Connections in a NetworkHard52%
Depth-First SearchGraph TheoryBiconnected ComponentBridge (Graph)
Trapping Rain Water IIHard52%
ArrayBreadth-First SearchHeap (Priority Queue)Matrix
Next Greater Element IIMedium52%
ArrayStackMonotonic Stack
121. Best Time to Buy and Sell StockEasy52%
ArrayDynamic Programming
3SumMedium52%
ArrayTwo PointersSorting
417. Pacific Atlantic Water FlowMedium52%
ArrayDepth-First SearchBreadth-First SearchMatrix
5. Longest Palindromic SubstringMedium52%
Two PointersStringDynamic ProgrammingManacher
23. Merge k Sorted ListsHard52%
Linked ListDivide and ConquerHeap (Priority Queue)Merge SortTournament Sort
54. Spiral MatrixMedium52%
ArrayMatrixSimulation
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