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

Given two binary trees, write a function to check if they areequal or not.
Two binary trees are considered equal if they are structurallyidentical and the nodes have the same value.

给定两个二叉树，写一个函数来检查它们是否是相等或不相等。

如果两个二叉树在结构上相同且节点具有相同的值，则它们被认为是相等的。

代码实现如下：

bool isSameTree(TreeNode *p, TreeNode *q) {if (p == NULL && q == NULL)return true;if ((p == NULL && q != NULL) || (p != NULL && q == NULL))return false;if (p->val != q->val)return false;bool left = isSameTree(p->left, q->left);bool right = isSameTree(p->right, q->right);return left && right;}

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