# [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。