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All Topics Algorithms Backend
Design Concurrency Database Database
Design Java Javascript Object Oriented
Design Programming
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Title	Difficulty	Companies
All Paths from Source to Target	Medium	amazon bloomberg
Design Snake Game	Medium	amazon apple bloomberg facebook google salesforce uber zillow
Dice Roll Simulation	Hard	akuna-capital atlassian bloomberg google
Dutch National Flag DNF	Medium	amazon apple bloomberg ebay facebook google linkedin microsoft oracle paypal pocket-gems pure-storage uber vmware yahoo
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowed	Medium	adobe affirm amazon appdynamics apple bloomberg databricks facebook flipkart goldman-sachs google indeed linkedin microsoft oracle pinterest pocket-gems pure-storage quora salesforce twilio twitter two-sigma uber visa vmware yandex yelp
Largest Sum of Averages	Medium	bloomberg google
Letter Case Permutation	Medium	amazon bloomberg facebook microsoft spotify yelp
Logger Rate Limiter	Easy	amazon apple atlassian bloomberg google linkedin microsoft uber
Longest Increasing Path in a Matrix	Hard	adobe amazon apple bloomberg bytedance facebook google microsoft snapchat uber
Longest Turbulent Subarray	Medium	amazon bloomberg
Maximum Frequency Stack	Hard	amazon apple bloomberg google microsoft salesforce uber
Maximum Length of Pair Chain	Medium	amazon bloomberg facebook uber
Maximum revenue by selling K tickets from N windows	Medium	bloomberg
Number of Longest Increasing Subsequence	Medium	amazon bloomberg facebook
Queue Reconstruction by Height	Medium	amazon apple bloomberg bytedance facebook google microsoft
Remove All Adjacent Duplicates in String 2	Medium	bloomberg facebook factset goldman-sachs google vmware
Shuffle an Array	Medium	amazon apple bloomberg cisco facebook google linkedin microsoft salesforce tripadvisor two-sigma yahoo
Third Maximum Number	Easy	amazon bloomberg facebook google microsoft
Two City Scheduling	Medium	amazon bloomberg facebook google
Walls and Gates	Medium	amazon apple bloomberg bytedance facebook google microsoft spotify uber
Lowest Common Ancestor of Deepest Leaves	Medium	bloomberg facebook google
Construct Binary Tree from Preorder and Postorder Traversal	Medium	amazon bloomberg facebook google uber
Alien Dictionary	Hard	airbnb amazon apple bloomberg cohesity doordash facebook flipkart google microsoft pinterest pocket-gems snapchat square twitter uber vmware
Delete in a Binary Search Tree	Medium	amazon apple bloomberg cisco facebook google linkedin microsoft oracle uber yahoo
Find Bottom Left Tree Value	Medium	bloomberg microsoft
Find K Closest Elements	Medium	amazon apple bloomberg ebay facebook google microsoft snapchat uber
Longest Substring with Same Letters after Replacement	Medium	bloomberg google pocket-gems
Non-overlapping Intervals	Medium	amazon apple bloomberg facebook google microsoft stripe
Pacific Atlantic Water Flow	Medium	amazon apple bloomberg facebook google microsoft oracle
Range Sum Query - Immutable	Easy	amazon bloomberg facebook goldman-sachs google microsoft palantir-technologies
Task Scheduler	Medium	amazon apple bloomberg facebook google microsoft nutanix oracle pinterest uber vmware
Top K Frequent Elements	Medium	amazon apple bloomberg bytedance ebay facebook goldman-sachs google hulu linkedin microsoft oracle pocket-gems snapchat spotify uber vmware yahoo yelp
Base 7	Easy	bloomberg google
Broken Calculator	Medium	bloomberg nutanix
Contain Virus	Hard	bloomberg
Flip Binary Tree To Match Preorder Traversal	Medium	bloomberg
Insert into a Sorted Circular Linked List	Medium	amazon bloomberg facebook google microsoft quip
K-diff Pairs in an Array	Medium	amazon bloomberg goldman-sachs microsoft oracle paypal salesforce twilio twitter
Maximum Depth of N-ary Tree	Easy	amazon bloomberg google sap
Minimum Number of Steps to Make Two Strings Anagram	Medium	bloomberg twitter
Minimum Window Subsequence	Hard	amazon bloomberg ebay google houzz microsoft
Number of Distinct Islands	Medium	amazon apple bloomberg facebook google lyft microsoft oracle uber
Number of Recent Calls	Easy	bloomberg google yandex
Number of Ships in a Rectangle	Hard	bloomberg
Prison Cells After N Days	Medium	amazon bloomberg
Shortest Distance to a Character	Easy	apple atlassian bloomberg facebook google
Array Nesting	Medium	apple bloomberg
Binary Tree Coloring Game	Medium	bloomberg google microsoft
Distant Barcodes	Medium	amazon bloomberg
Interval List Intersections	Medium	amazon apple bloomberg cruise-automation doordash facebook google oracle pinterest snapchat uber