[Vssue]0226.翻转二叉树.md

[youngyangyang04]

https://www.programmercarl.com/0226.%E7%BF%BB%E8%BD%AC%E4%BA%8C%E5%8F%89%E6%A0%91.html

[Du1in9]

class Solution {
    public TreeNode invertTree(TreeNode root) {
        if (root == null) return root;
        TreeNode temp = root.left;
        root.left = root.right;
        root.right = temp;

        invertTree(root.left);
        invertTree(root.right);
        return root;
    }
}