*Flatten Binary Tree to Linked List

REFERENCE:

https://blog.csdn.net/fuxuemingzhu/article/details/70241424

 

Given a binary tree, flatten it to a linked list in-place.

For example, given the following tree:

1 / \ 2 5 / \ \ 3 4 6

The flattened tree should look like:

1 \ 2 \ 3 \ 4 \ 5 \ 6

 

转载于:https://www.cnblogs.com/hygeia/p/10075099.html

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