[LeetCode] Same Tree 深度搜索

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.

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