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22 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
Check if doubly linked list is palindrome	easy	-	google
Convert a sorted doubly linked list DLL to balanced binary search tree	medium	-
Convert a sorted doubly linked list DLL to balanced binary search tree in-place	medium	-
Flatten Binary tree to double linked list in-place	medium	-
Maximum Number of Matching Indices After Right Shifts	easy	-
Minimum Pair Removal to Sort Array I	easy	-
Minimum Pair Removal to Sort Array II	hard	-
Reverse a Doubly Linked List	medium	-
Design LRU Cache	medium	-	adobe alibaba amazon
Convert Binary Search Tree to Sorted Doubly Linked List	medium	-	amazon bloomberg databricks
Flatten a Multilevel Doubly Linked List	medium	-	amazon apple bloomberg
All O`one Data Structure	hard		amazon bloomberg facebook
LFU Cache	hard	-	adobe alibaba amazon
Max Stack	hard	-	amazon bloomberg facebook
Design Browser History	medium	-	bloomberg
Rearrange Products Table Problem	easy	-
Design Authentication Manager	medium	-
Maximum Total Importance of Roads	medium
Design a Text Editor	hard	-
Find the Power of K-Size Subarrays 1	medium	-
Convert Doubly Linked List to Array I	easy	-
Convert Doubly Linked List to Array II	medium	-