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47 problems total

Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)

All Topics(4301)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3944)

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Title	Difficulty	Videos	Companies
3Sum0 - Find three elements in an array that sum to a zero	medium		adobe akuna-capital alibaba
3Sum - Closest	medium	-	adobe amazon apple
4Sum	medium	-	adobe amazon apple
Group Anagrams	medium		adobe affirm amazon
Merge Overlapping Intervals	medium		adobe alibaba amazon
Dutch National Flag DNF	medium		amazon apple bloomberg
Merge Two Sorted Arrays	easy	-	adobe amazon apple
Insertion Sort on List	medium	-	bloomberg google microsoft
Kth Largest Element in an Array	medium	-	adobe airbnb alibaba
Contains Duplicate 1 - Check if array has duplicates	easy		adobe airbnb amazon
Majority Element 2 - With n by 3 definition	medium	-	adobe amazon apple
Valid Anagram	easy		amazon apple bloomberg
Meeting Rooms 1 - Can person attend all meetings	easy		amazon bloomberg facebook
Maximum Intervals Overlap Count	medium		amazon apple atlassian
Missing Number	easy		adobe amazon apple
H-Index	medium	-	adobe bloomberg facebook
Find Median from Data Stream	hard		adobe amazon apple
Binary Tree Traversal - Vertical Order Traversal	medium	-	adobe amazon bloomberg
Top K Frequent Elements	medium		amazon apple bloomberg
Intersection of Two Arrays 1 - Unique Elements	easy		amazon apple bloomberg
Intersection of Two Arrays 2 - Duplicates allowed	easy	-	amazon apple bloomberg
Kth Smallest Element in a Sorted Matrix	medium	-	adobe amazon apple
Queue Reconstruction by Height	medium	-	amazon apple bloomberg
Third Maximum Number	easy	-	amazon bloomberg facebook
Non-overlapping Intervals	medium		amazon apple bloomberg
Sort Characters By Frequency	medium	-	amazon bloomberg expedia
K-diff Pairs in an Array	medium	-	amazon bloomberg goldman-sachs
Shortest Unsorted Continuous Subarray	medium	-	amazon bloomberg google
Valid Triangle Number	medium	-	amazon bloomberg expedia
Task Scheduler	medium	-	amazon apple bloomberg
Maximum Product of Three Numbers	easy	-	amazon apple bloomberg
Design Search Autocomplete System	hard	-	amazon apple bloomberg
Maximum Length of Pair Chain	medium	-	amazon bloomberg facebook
Find K Closest Elements	medium	-	amazon apple bloomberg
Top K Frequent Words	medium	-	adobe amazon apple
Accounts Merge	medium	-	amazon apple bloomberg
Employee Free Time	hard	-	airbnb amazon bloomberg
Hand of Straights	medium		bloomberg coupang ebay
Minimum Cost to Hire K Workers	hard		bloomberg google
Sort an array	medium		amazon apple bloomberg
Squares of a Sorted array	easy	-	adobe amazon apple
Vertical Order Traversal of a Binary Tree	hard	-	adobe amazon bloomberg
Two City Scheduling	medium	-	amazon bloomberg facebook
Distant Barcodes	medium	-	amazon bloomberg
Invalid Transactions	medium	-	bloomberg
Design A Leaderboard	medium	-	amazon bloomberg google
Allocate Mailboxes	hard	-	bloomberg

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