leetcode Flatten Binary Tree to Linked List
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题目链接
思路：
用一个递归思路，很简单
/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */public class Solution { public void flatten(TreeNode root) { if(root==null) { return; } flatten(root.left); TreeNode right=root.right; if(root.left!=null) { TreeNode temp=root.left; while(temp.right!=null) { temp=temp.right; } root.right=root.left; temp.right=right; } root.left=null; flatten(right); }} 0 0
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