All Problems

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

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TitleDifficultyVideosCompanies
Regular Expression Matchinghard-
adobeairbnbalibaba
First Missing Positivehard-
adobeamazonapple
Trapping Rain Waterhard-
adobeaffirmairbnb
Decode Waysmedium
adobeamazonapple
Flatten binary tree to linked list in order of preorder traversalmedium-
adobeamazonapple
Skyline Problemhard-
adobeamazonapple
Sliding Window Maximumhard-
adobealibabaamazon
Binary Tree Traversal - Vertical Order Traversalmedium-
adobeamazonbloomberg
Intersection of Two Arrays 2 - Duplicates allowedeasy-
amazonapplebloomberg
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowedmedium-
adobeaffirmamazon
Insert Delete Search and GetRandom in Constant Time 2 - Duplicates allowedhard-
affirmamazonapple
Convert Binary Search Tree to Sorted Doubly Linked Listmedium-
amazonbloombergdatabricks
Second Degree Followermedium-
databricksfacebook
Remove Commentsmedium-
databricksgoldman-sachsgoogle
Closest Leaf in a Binary Treemedium-
amazondatabricksfacebook
Time Based Key-Value Storemedium-
amazonappleatlassian
Vertical Order Traversal of a Binary Treehard-
adobeamazonbloomberg
Web Crawler Multithreadedmedium-
amazondatabricksdropbox