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49 questions tracked41 with solutions
Frequency scoreSorted highest β lowest frequencyβ Our Solution = we have a detailed walkthrough
Showing 49 of 49 questions
1ArrayBacktrackingBit Manipulation
2ArrayHash TableStringDynamic Programming+2
4MediumLongest Substring with At Most K Distinct Characters
Hash TableStringSliding Window
5Hash TableLinked ListDesignDoubly-Linked List
6DesignSegment TreeOrdered Set
7MediumSplit BST
TreeBinary Search TreeRecursionBinary Tree
9Hash TableLinked ListDesignDoubly-Linked List
10Depth-First SearchBreadth-First SearchGraphTopological Sort
11HardDesign In-Memory File System
Hash TableStringDesignTrie+1
12ArrayDynamic ProgrammingMatrix
13Hash TableLinked ListDesignHeap (Priority Queue)
14Depth-First SearchBreadth-First SearchUnion FindGraph
15ArrayDynamic ProgrammingBacktrackingBit Manipulation+2
16MediumLongest Repeating Substring
StringBinary SearchDynamic ProgrammingRolling Hash+2
17MathDynamic ProgrammingCombinatorics
18StringDynamic ProgrammingRecursion
19ArrayTwo PointersBinary SearchSliding Window+2
20StringStackGreedyMonotonic Stack
21Hash TableStringSliding Window
22ArrayDepth-First SearchBreadth-First SearchMatrix
23StringBinary SearchSliding WindowRolling Hash+2
24MediumDesign Hit Counter
ArrayBinary SearchDesignQueue+1
25ArrayQueueSliding WindowHeap (Priority Queue)+1
27ArrayHash TableBinary SearchDesign
29ArrayHash TableStringSorting
30MediumNumber of Distinct Islands
Hash TableDepth-First SearchBreadth-First SearchUnion Find+1
32Dynamic ProgrammingDepth-First SearchBreadth-First SearchGraph+2
33ArrayDepth-First SearchBreadth-First SearchUnion Find+1
34StringDynamic ProgrammingGreedyRecursion
35StringDynamic Programming
36MediumBuildings With an Ocean View
ArrayStackMonotonic Stack
37ArrayTwo PointersBinary SearchGreedy+3
38Hash TableStringGreedySorting+2
39ArrayDivide and ConquerSortingHeap (Priority Queue)+1
40ArrayHash TableBreadth-First Search
42Hash TableStringStackSorting
43Two PointersDesignSortingHeap (Priority Queue)+1
44ArrayHash TableStringBreadth-First Search
45ArrayDepth-First SearchBreadth-First SearchMatrix
46ArrayBinary SearchDivide and ConquerMatrix
47HardBasic Calculator III
MathStringStackRecursion