C# LeetCode刷题 - 226. Invert Binary Tree(剑指offer 面试题19) - 题解

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C#版 - 226. Invert Binary Tree - 题解

在线提交: https://leetcode.com/problems/invert-binary-tree/
或 http://www.nowcoder.com/practice/564f4c26aa584921bc75623e48ca3011?tpId=13&tqId=11171

题目描述

---

Invert a binary tree.

Example:

Input:

     4
   /   \
  2     7
 / \   / \
1   3 6   9

Output:

     4
   /   \
  7     2
 / \   / \
9   6 3   1

Trivia:
This problem was inspired by this original tweet