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
554. Brick Wall	Solve	Medium	Bloomberg+1	Array Hash Table
560. Subarray Sum Equals K	Solve	Medium	Adobe+15	Array Hash Table+1
567. Permutation in String	Solve	Medium	Amazon+7	Hash Table Sliding Window+2
575. Distribute Candies	Solve	Easy	LiveRamp	Array Hash Table
582. Kill Process	Solve	Medium	Amazon+1	Array Breadth-First Search+3
588. Design In-Memory File System	Solve	Hard	Amazon+5	Design Hash Table+3
594. Longest Harmonious Subsequence	Solve	Easy	LiveRamp	Array Counting+3
599. Minimum Index Sum of Two Lists	Solve	Easy	Apple+2	Array Hash Table+1
609. Find Duplicate File in System	Solve	Medium	Apple+1	Array Hash Table+1
616. Add Bold Tag in String	Solve	Medium	Facebook	Array Hash Table+3
621. Task Scheduler	Solve	Medium	Amazon+4	Array Counting+4
632. Smallest Range Covering Elements from K Lists	Solve	Hard	Adobe+8	Array Greedy+4
635. Design Log Storage System	Solve	Medium	Twitter	Design Hash Table+2
645. Set Mismatch	Solve	Easy	Adobe	Array Bit Manipulation+2
648. Replace Words	Solve	Medium	Facebook	Array Hash Table+2
652. Find Duplicate Subtrees	Solve	Medium	Amazon+2	Binary Tree Depth-First Search+2
653. Two Sum IV - Input is a BST	Solve	Easy	Amazon+1	Binary Search Tree Binary Tree+5
659. Split Array into Consecutive Subsequences	Solve	Medium	Bloomberg+1	Array Greedy+2
666. Path Sum IV	Solve	Medium	Alibaba+1	Array Binary Tree+3
676. Implement Magic Dictionary	Solve	Medium	Facebook+1	Depth-First Search Design+3
677. Map Sum Pairs	Solve	Medium	Google	Design Hash Table+2
681. Next Closest Time	Solve	Medium	Amazon+1	Backtracking Enumeration+2
690. Employee Importance	Solve	Medium	Apple+1	Array Breadth-First Search+3
692. Top K Frequent Words	Solve	Medium	Amazon+8	Bucket Sort Counting+5
694. Number of Distinct Islands	Solve	Medium	Amazon+3	Breadth-First Search Depth-First Search+3
697. Degree of an Array	Solve	Easy	Adobe+6	Array Hash Table
705. Design HashSet	Solve	Easy	Amazon+6	Array Design+3
706. Design HashMap	Solve	Easy	Adobe+26	Array Design+3
710. Random Pick with Blacklist	Solve	Hard	Amazon+2	Array Binary Search+4
711. Number of Distinct Islands II	Solve	Hard	Amazon+1	Breadth-First Search Depth-First Search+3
720. Longest Word in Dictionary	Solve	Medium	Google	Array Hash Table+3
721. Accounts Merge	Solve	Medium	Amazon+6	Array Breadth-First Search+5
726. Number of Atoms	Solve	Hard	Amazon+5	Hash Table Sorting+2
734. Sentence Similarity	Solve	Easy	Facebook+1	Array Hash Table+1
736. Parse Lisp Expression	Solve	Hard	Affirm	Hash Table Recursion+2
737. Sentence Similarity II	Solve	Medium	Amazon	Array Breadth-First Search+4
740. Delete and Earn	Solve	Medium	Amazon+2	Array Dynamic Programming+1
745. Prefix and Suffix Search	Solve	Hard	Facebook+2	Array Design+3
748. Shortest Completing Word	Solve	Easy	Google	Array Hash Table+1
752. Open the Lock	Solve	Medium	Amazon+4	Array Breadth-First Search+2
758. Bold Words in String	Solve	Medium	Google	Array Hash Table+3
760. Find Anagram Mappings	Solve	Easy	Google	Array Hash Table
763. Partition Labels	Solve	Medium	Amazon+1	Greedy Hash Table+2
767. Reorganize String	Solve	Medium	Adobe+17	Counting Greedy+4
770. Basic Calculator IV	Solve	Hard	Adobe+1	Hash Table Math+3
771. Jewels and Stones	Solve	Easy	Adobe+2	Hash Table String
781. Rabbits in Forest	Solve	Medium	Adobe+2	Array Greedy+2
791. Custom Sort String	Solve	Medium	Facebook+1	Hash Table Sorting+1
792. Number of Matching Subsequences	Solve	Medium	Google+1	Array Binary Search+5
804. Unique Morse Code Words	Solve	Easy	Square	Array Hash Table+1