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Flatten Binary Tree to Linked List | Leetcode #114

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This video explains an important Tree and Linked List interview problem which is how to flatten a binary tree to a linked list. I have explained the entire problem with intuition for a solution and have also explained the possible follow-up problems at the end of the video. This includes flattening a binary tree to a double linked list, circular linked list using multiple traversals like preorder, inorder and postorder.
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