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2020-08-07 17:06:53 +08:00

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# [100. Same Tree](https://leetcode.com/problems/same-tree/)
## 题目
Given two binary trees, write a function to check if they are the same or not.
Two binary trees are considered the same if they are structurally identical and the nodes have the same value.
Example 1:
```c
Input: 1 1
/ \ / \
2 3 2 3
[1,2,3], [1,2,3]
Output: true
```
Example 2:
```c
Input: 1 1
/ \
2 2
[1,2], [1,null,2]
Output: false
```
Example 3:
```c
Input: 1 1
/ \ / \
2 1 1 2
[1,2,1], [1,1,2]
Output: false
```
## 题目大意
这一题要求判断 2 颗树是否是完全相等的。
## 解题思路
递归判断即可。