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9 problems total

Array (174)Sorting (45)Depth First Search (44)Tree (41)Breadth First Search (35)Linked List (28)Stack (27)Recursion (18)Graph Theory (12)Monotonic Stack (8)Queue (6)Shortest Path (2)

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Title	Difficulty	Videos	Companies
Word Search 1 - Find if word exists	medium		adobe amazon apple
Validate Binary Search Tree	medium		adobe amazon apple
Maximum Depth of Binary Tree	easy		adobe amazon apple
Lowest Common Ancestor of a Binary Search Tree	medium		adobe amazon bloomberg
Lowest Common Ancestor of a Binary Tree	medium		adobe airbnb amazon
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Nested List Weight Sum 2	medium	-	didi facebook linkedin
Serialize and Deserialize Binary Search Tree BST	medium	-	amazon bytedance ebay
Vertical Order Traversal of a Binary Tree	hard	-	adobe amazon bloomberg