LeetCode -- Invert Binary Tree

Source: Internet
Author: User

LeetCode -- Invert Binary Tree
Invert a binary tree.

2 7
1 3 6 9
7 2
9 6 3 1

It is to reverse a binary tree.

The implementation of this question is more direct: Subsequent traversal and node switching.

Implementation Code:

/*** Definition for a binary tree node. * public class TreeNode {* public int val; * public TreeNode left; * public TreeNode right; * public TreeNode (int x) {val = x ;} *} */public class Solution {public TreeNode InvertTree (TreeNode root) {Travel (ref root); return root;} private void Travel (ref TreeNode current) {if (current = null | current. left = null & current. right = null) {return;} Travel (ref current. left); Travel (ref current. right); Swap (ref current);} private void Swap (ref TreeNode n) {var tmp = n. left; n. left = n. right; n. right = tmp ;}}


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