Dashboard Questions Topics Companies Sheets

Hash Table

Topic

645 coding problems covering Hash Table concepts. Master this topic and improve your problem-solving skills.

645

Problems

158

Easy

383

Medium

104

Hard

Difficulty

All645 Easy158 Medium383 Hard104

Title	Solve	Difficulty	Companies	Topics
811. Subdomain Visit Count	Solve	Medium	Indeed+4	Array Counting+2
815. Bus Routes	Solve	Hard	Amazon+7	Array Breadth-First Search+1
817. Linked List Components	Solve	Medium	Amazon+1	Array Hash Table+1
819. Most Common Word	Solve	Easy	Amazon	Array Counting+2
820. Short Encoding of Words	Solve	Medium	Amazon+1	Array Hash Table+2
822. Card Flipping Game	Solve	Medium	-	Array Hash Table
823. Binary Trees With Factors	Solve	Medium	Amazon+2	Array Dynamic Programming+2
828. Count Unique Characters of All Substrings of a Given String	Solve	Hard	Amazon+3	Dynamic Programming Hash Table+1
833. Find And Replace in String	Solve	Medium	Google+2	Array Hash Table+2
839. Similar String Groups	Solve	Hard	Apple+1	Array Breadth-First Search+4
840. Magic Squares In Grid	Solve	Medium	Google	Array Hash Table+2
846. Hand of Straights	Solve	Medium	Google	Array Greedy+2
859. Buddy Strings	Solve	Easy	DoorDash+4	Hash Table String
863. All Nodes Distance K in Binary Tree	Solve	Medium	Amazon+18	Binary Tree Breadth-First Search+3
865. Smallest Subtree with all the Deepest Nodes	Solve	Medium	Amazon+2	Binary Tree Breadth-First Search+3
869. Reordered Power of 2	Solve	Medium	Adobe+4	Counting Enumeration+3
873. Length of Longest Fibonacci Subsequence	Solve	Medium	Baidu	Array Dynamic Programming+1
874. Walking Robot Simulation	Solve	Medium	Jane Street	Array Hash Table+1
884. Uncommon Words from Two Sentences	Solve	Easy	Facebook+1	Counting Hash Table+1
888. Fair Candy Swap	Solve	Easy	Amazon+1	Array Binary Search+2
889. Construct Binary Tree from Preorder and Postorder Traversal	Solve	Medium	Amazon+1	Array Binary Tree+3
890. Find and Replace Pattern	Solve	Medium	Apple	Array Hash Table+1
893. Groups of Special-Equivalent Strings	Solve	Medium	Facebook	Array Hash Table+2
895. Maximum Frequency Stack	Solve	Hard	Adobe+7	Design Hash Table+2
904. Fruit Into Baskets	Solve	Medium	Amazon	Array Hash Table+1
911. Online Election	Solve	Medium	Atlassian+1	Array Binary Search+2
914. X of a Kind in a Deck of Cards	Solve	Easy	Google	Array Counting+3
916. Word Subsets	Solve	Medium	Adobe+2	Array Hash Table+1
923. 3Sum With Multiplicity	Solve	Medium	Adobe+1	Array Counting+3
924. Minimize Malware Spread	Solve	Hard	Adobe+3	Array Breadth-First Search+4
928. Minimize Malware Spread II	Solve	Hard	Dropbox+1	Array Breadth-First Search+4
929. Unique Email Addresses	Solve	Easy	Intuit	Array Hash Table+1
930. Binary Subarrays With Sum	Solve	Medium	Amazon+4	Array Hash Table+2
939. Minimum Area Rectangle	Solve	Medium	Facebook+2	Array Geometry+3
947. Most Stones Removed with Same Row or Column	Solve	Medium	Amazon+3	Depth-First Search Graph+2
952. Largest Component Size by Common Factor	Solve	Hard	Google	Array Hash Table+3
953. Verifying an Alien Dictionary	Solve	Easy	Amazon+3	Array Hash Table+1
954. Array of Doubled Pairs	Solve	Medium	Google	Array Greedy+2
957. Prison Cells After N Days	Solve	Medium	SAP	Array Bit Manipulation+2
959. Regions Cut By Slashes	Solve	Medium	Amazon+1	Array Breadth-First Search+4
961. N-Repeated Element in Size 2N Array	Solve	Easy	Akamai	Array Hash Table
966. Vowel Spellchecker	Solve	Medium	Thumbtack	Array Hash Table+1
970. Powerful Integers	Solve	Medium	Amazon	Enumeration Hash Table+1
974. Subarray Sums Divisible by K	Solve	Medium	Amazon+3	Array Hash Table+1
981. Time Based Key-Value Store	Solve	Medium	Amazon+5	Binary Search Design+2
982. Triples with Bitwise AND Equal To Zero	Solve	Hard	Flipkart	Array Bit Manipulation+1
987. Vertical Order Traversal of a Binary Tree	Solve	Hard	Amazon+4	Binary Tree Breadth-First Search+4
992. Subarrays with K Different Integers	Solve	Hard	Adobe+10	Array Counting+2
996. Number of Squareful Arrays	Solve	Hard	Apple+1	Array Backtracking+5
997. Find the Town Judge	Solve	Easy	Adobe+3	Array Graph+1