Given two binary trees, write a function to check if they are equal or not.

题目大意：给定两个二叉树，判断两者是否是相同的二叉树。即结构相同且对应节点的值也相同。

youdao

Given two binary trees, write a function to check if they are equal or not.

题目大意：给定两个二叉树，判断两者是否是相同的二叉树。即结构相同且对应节点的值也相同。

youdao