LeetCode The Hard Way

Microsoft

1371 problems

ProblemDifficultyFrequency Topics
1466. Reorder Routes to Make All Paths Lead to the City ZeroMedium37.5%
Depth-First SearchBreadth-First SearchGraph Theory
334. Increasing Triplet SubsequenceMedium37.5%
ArrayGreedyLongest Increasing Subsequence
Diagonal TraverseMedium37.5%
ArrayMatrixSimulation
622. Design Circular QueueMedium37.5%
ArrayLinked ListDesignQueue
761. Special Binary StringHard37.5%
StringDivide and ConquerSorting
Construct Binary Tree from Inorder and Postorder TraversalMedium36.2%
ArrayHash TableDivide and ConquerTreeBinary Tree
Best Time to Buy and Sell Stock IIIHard36.2%
ArrayDynamic Programming
165. Compare Version NumbersMedium36.2%
Two PointersString
199. Binary Tree Right Side ViewMedium36.2%
TreeDepth-First SearchBreadth-First SearchBinary Tree
H-IndexMedium36.2%
ArraySortingCounting Sort
Assign CookiesEasy36.2%
ArrayTwo PointersGreedySortingQuicksort
Find Customer RefereeEasy36.2%
Database
Big CountriesEasy36.2%
Database
Design Search Autocomplete SystemHard36.2%
StringDepth-First SearchDesignTrieSortingHeap (Priority Queue)Data Stream
680. Valid Palindrome IIEasy36.2%
Two PointersStringGreedy
904. Fruit Into BasketsMedium36.2%
ArrayHash TableSliding Window
987. Vertical Order Traversal of a Binary TreeHard36.2%
Hash TableTreeDepth-First SearchBreadth-First SearchSortingBinary Tree
1027. Longest Arithmetic SubsequenceMedium36.2%
ArrayHash TableBinary SearchDynamic Programming
1304. Find N Unique Integers Sum up to ZeroEasy36.2%
ArrayMath
1394. Find Lucky Integer in an ArrayEasy36.2%
ArrayHash TableCounting
1523. Count Odd Numbers in an Interval RangeEasy36.2%
Math
Customer Who Visited but Did Not Make Any TransactionsEasy36.2%
Database
1653. Minimum Deletions to Make String BalancedMedium36.2%
StringDynamic ProgrammingStack
2246. Longest Path With Different Adjacent CharactersHard36.2%
ArrayStringTreeDepth-First SearchGraph TheoryTopological Sort
2333. Minimum Sum of Squared DifferenceMedium36.2%
ArrayBinary SearchGreedySortingHeap (Priority Queue)
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