[Leetcode] Flatten Binary Tree to Linked List (Java)
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Given a binary tree, flatten it to a linked list in-place.
For example,
Given
1 / \ 2 5 / \ \ 3 4 6The flattened tree should look like:
1 \ 2 \ 3 \ 4 \ 5 \ 6
根据上述规律转换二叉树
递归把左子树放到右子树，并将原来右子树放到原来左子树的最右儿子上
public class Solution { public void flatten(TreeNode root) { if(root==null)return;TreeNode left = root.left;TreeNode right = root.right;if(left!=null){flatten(root.left);root.right = left;root.left = null;TreeNode cur = root.right;while(cur.right!=null)cur = cur.right;cur.right = right;}if(right!=null)flatten(right); }} 0 0
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