226. 翻转二叉树
作者:互联网
题目描述
翻转一棵二叉树。
示例:
输入:
输出:
来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/invert-binary-tree
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思路
/**
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode() {}
* TreeNode(int val) { this.val = val; }
* TreeNode(int val, TreeNode left, TreeNode right) {
* this.val = val;
* this.left = left;
* this.right = right;
* }
* }
*/
class Solution {
public TreeNode invertTree(TreeNode root) {
if(root == null){
return null;
}
TreeNode left = invertTree(root.left);
TreeNode right = invertTree(root.right);
root.left = right;
root.right = left;
return root;
}
}
标签:right,TreeNode,invertTree,val,二叉树,226,翻转,root,left 来源: https://blog.csdn.net/weixin_42529866/article/details/113691232