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Array (184)Sorting Algorithms (48)Depth First Search (46)Tree (42)Breadth First Search (36)Linked List (30)Stack (29)Recursion (18)Graph Theory (13)Monotonic Stack (10)Queue (7)Shortest Path (3)

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Title	Difficulty	Videos	Companies
Binary Tree Bottom View	medium	-	yelp
Binary Tree Level Order Traversal	medium		microsoft
Binary Tree Top View	medium	-
Create linked lists of all the nodes at each depth for a Binary Tree	medium	-
Find right-most cousin in a binary tree	medium	-
Find Vertical Sum in binary Tree	medium	-
Print or return nodes between two given levels in a binary tree	medium	-
Generate Parentheses	medium	-	adobe alibaba amazon
Validate Binary Search Tree	medium		adobe amazon apple
Binary Tree Level Order Traversal - Level by Level	medium		adobe amazon apple
Binary Tree Traversal - Zigzag Level Order Traversal	medium	-	amazon apple bloomberg
Find Largest Value in Each Tree Row	medium		amazon apple facebook
Maximum Width of Binary Tree	medium	-	amazon bloomberg ebay
Maximum Level Sum of a Binary Tree	medium	-	amazon google
Reverse Odd Levels of Binary Tree	medium
Minimum Number of Operations to Sort a Binary Tree by Level	medium
Kth Largest Sum in a Binary Tree	medium
Level of Binary Tree with minimum sum	medium	-