leetcode_572. Subtree of Another Tree ? 待解决

Given two non-empty binary trees s and t, check whether tree t has exactly the same structure and node values with a subtree of s. A subtree of s is a tree consists of a node in s and all of this node’s descendants. The tree s could also be considered as a subtree of itself.

提示：提交代码后，需要用简洁的语言解释一下代码思路~ 谢谢

历史题目和总结见公众号「每日一道算法题」

Leetcode 正在招聘，有兴趣的小伙伴可以去官网看看。

https://leetcode.com/problems/subtree-of-another-tree/description/

思路：