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
508. Most Frequent Subtree Sum	Solve	Medium	Apple	Binary Tree Depth-First Search+2
519. Random Flip Matrix	Solve	Medium	Google	Hash Table Math+2
522. Longest Uncommon Subsequence II	Solve	Medium	Apple	Array Hash Table+3
523. Continuous Subarray Sum	Solve	Medium	Amazon+6	Array Hash Table+2
525. Contiguous Array	Solve	Medium	Amazon+3	Array Hash Table+1
531. Lonely Pixel I	Solve	Medium	Google+2	Array Hash Table+1
532. K-diff Pairs in an Array	Solve	Medium	Adobe+7	Array Binary Search+3
533. Lonely Pixel II	Solve	Medium	Google	Array Hash Table+1
535. Encode and Decode TinyURL	Solve	Medium	Amazon+2	Design Hash Function+2
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
582. Kill Process	Solve	Medium	Amazon+1	Array Breadth-First Search+3
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
635. Design Log Storage System	Solve	Medium	Twitter	Design Hash Table+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
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
720. Longest Word in Dictionary	Solve	Medium	Google	Array Hash Table+3
721. Accounts Merge	Solve	Medium	Amazon+6	Array Breadth-First Search+5
737. Sentence Similarity II	Solve	Medium	Amazon	Array Breadth-First Search+4
740. Delete and Earn	Solve	Medium	Amazon+2	Array Dynamic Programming+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
763. Partition Labels	Solve	Medium	Amazon+1	Greedy Hash Table+2
767. Reorganize String	Solve	Medium	Adobe+17	Counting Greedy+4
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
811. Subdomain Visit Count	Solve	Medium	Indeed+4	Array Counting+2
817. Linked List Components	Solve	Medium	Amazon+1	Array Hash Table+1
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
833. Find And Replace in String	Solve	Medium	Google+2	Array Hash Table+2
840. Magic Squares In Grid	Solve	Medium	Google	Array Hash Table+2
846. Hand of Straights	Solve	Medium	Google	Array Greedy+2
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