LeetCode100——Same Tree

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

Two binary trees are considered equal if they are structurally identical and the nodes have the same value.

难度系数：

容易

实现

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