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DSA Question Tracker & Breakdowns

113 problems tagged Hash Table with full breakdowns.

433problems
32companies
39topics
3languages each
Hash Table✕Clear all
1.Two Sum
ArrayHash Table
Easy+10▶ Mock
3.Longest Substring Without Repeating Characters
Hash TableStringSliding Window
Medium+13▶ Mock
49.Group Anagrams
Hash TableStringSorting
Medium+9▶ Mock
347.Top K Frequent Elements
ArrayHash TableHeap
Medium+6▶ Mock
128.Longest Consecutive Sequence
ArrayHash TableUnion Find
Medium+3▶ Mock
560.Subarray Sum Equals K
ArrayHash TablePrefix Sum
Medium+2▶ Mock
146.LRU Cache
Hash TableLinked ListDesign
Medium+9▶ Mock
139.Word Break
Dynamic ProgrammingHash TableTrie
Medium+5▶ Mock
438.Find All Anagrams in a String
Hash TableStringSliding Window
Medium+2▶ Mock
133.Clone Graph
Depth-First SearchBreadth-First SearchGraph
Medium+1▶ Mock
621.Task Scheduler
GreedyHeapHash Table
Medium+2▶ Mock
460.LFU Cache
Hash TableLinked ListDesign
Hard+1▶ Mock
1146.Snapshot Array
ArrayHash TableBinary Search
Medium▶ Mock
567.Permutation in String
Hash TableTwo PointersString
Medium▶ Mock
981.Time Based Key-Value Store
Hash TableStringBinary Search
Medium+1▶ Mock
76.Minimum Window Substring
Hash TableStringSliding Window
13.Roman to Integer
Hash TableMathString
Easy+1▶ Mock
17.Letter Combinations of a Phone Number
Hash TableStringBacktracking
Medium+1▶ Mock
12.Integer to Roman
Hash TableMathString
Medium▶ Mock
721.Accounts Merge
ArrayHash TableString
Medium▶ Mock
2502.Design Memory Allocator
ArrayHash TableDesign
Medium+1▶ Mock
904.Fruit Into Baskets
ArrayHash TableSliding Window
Medium▶ Mock
169.Majority Element
ArrayHash TableDivide and Conquer
138.Copy List with Random Pointer
Hash TableLinked List
Medium+1▶ Mock
2408.Design SQL
ArrayHash TableString
Medium▶ Mock
1429.First Unique Number
ArrayHash TableDesign
Medium▶ Mock
424.Longest Repeating Character Replacement
Hash TableStringSliding Window
Medium▶ Mock
1797.Design Authentication Manager
Hash TableLinked ListDesign
Medium▶ Mock
2402.Meeting Rooms III
ArrayHash TableSorting
127.Word Ladder
Hash TableStringBreadth-First Search
219.Contains Duplicate II
ArrayHash TableSliding Window
359.Design Logger Rate Limiter
Hash TableDesignData Stream
217.Contains Duplicate
ArrayHash TableSorting
2034.Stock Price Fluctuation
Hash TableDesignHeap
Medium▶ Mock
3484.Design Spreadsheet
ArrayHash TableString
Medium▶ Mock
631.Design Excel Sum Formula
ArrayHash TableString
432.All O'one Data Structure
Hash TableLinked ListDesign
1138.Alphabet Board Path
Hash TableString
Medium▶ Mock
314.Binary Tree Vertical Order Traversal
Hash TableTreeDepth-First Search
Medium▶ Mock
815.Bus Routes
ArrayHash TableBreadth-First Search
1386.Cinema Seat Allocation
ArrayHash TableGreedy
Medium▶ Mock
740.Delete and Earn
ArrayHash TableDynamic Programming
Medium▶ Mock
2353.Design a Food Rating System
ArrayHash TableString
Medium▶ Mock
3829.Design Ride Sharing System
Hash TableDesignQueue
Medium▶ Mock
353.Design Snake Game
ArrayHash TableDesign
Medium▶ Mock
3408.Design Task Manager
Hash TableDesignHeap
Medium▶ Mock
348.Design Tic-Tac-Toe
ArrayHash TableDesign
Medium▶ Mock
1396.Design Underground System
Hash TableStringDesign
Medium▶ Mock
141.Linked List Cycle
Hash TableLinked ListTwo Pointers
1048.Longest String Chain
ArrayHash TableTwo Pointers
Medium▶ Mock
2933.High-Access Employees
ArrayHash TableString
Medium▶ Mock
1366.Rank Teams by Votes
ArrayHash TableString
Medium▶ Mock
2561.Rearranging Fruits
ArrayHash TableGreedy
767.Reorganize String
Hash TableStringGreedy
Medium▶ Mock
2251.Number of Flowers in Full Bloom
ArrayHash TableBinary Search
305.Number of Islands II
ArrayHash TableUnion Find
1915.Number of Wonderful Substrings
Hash TableStringBit Manipulation
Medium▶ Mock
73.Set Matrix Zeroes
ArrayHash TableMatrix
Medium▶ Mock
36.Valid Sudoku
ArrayHash TableMatrix
Medium▶ Mock
645.Set Mismatch
ArrayHash TableBit Manipulation
692.Top K Frequent Words
ArrayHash TableString
Medium▶ Mock
737.Sentence Similarity II
ArrayHash TableString
Medium▶ Mock
1676.Lowest Common Ancestor of a Binary Tree IV
Hash TableTreeDepth-First Search
Medium▶ Mock
1258.Synonymous Sentences
ArrayHash TableString
Medium▶ Mock
987.Vertical Order Traversal of a Binary Tree
Hash TableTreeDepth-First Search
140.Word Break II
ArrayHash TableString
Valid Anagram
Hash TableStringSorting
Missing Number
ArrayHash TableMath
Happy Number
Hash TableMathTwo Pointers
Easy+1▶ Mock
149.Max Points on a Line
ArrayHash TableMath
205.Isomorphic Strings
Hash TableString
244.Shortest Word Distance II
ArrayHash TableTwo Pointers
Medium▶ Mock
383.Ransom Note
Hash TableStringCounting
496.Next Greater Element I
ArrayHash TableStack
694.Number of Distinct Islands
Hash TableDepth-First SearchBreadth-First Search
Medium▶ Mock
706.Design HashMap
ArrayHash TableLinked List
928.Minimize Malware Spread II
ArrayHash TableDepth-First Search
974.Subarray Sums Divisible by K
ArrayHash TablePrefix Sum
Medium▶ Mock
1086.High Five
ArrayHash TableSorting
1202.Smallest String With Swaps
ArrayHash TableString
Medium▶ Mock
1244.Design A Leaderboard
Hash TableDesignSorting
Medium▶ Mock
1600.Throne Inheritance
Hash TableTreeDepth-First Search
Medium▶ Mock
2043.Simple Bank System
ArrayHash TableDesign
Medium▶ Mock
3092.Most Frequent IDs
ArrayHash TableHeap
Medium▶ Mock

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