LeetCode OJ:Same Tree

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.

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);    }};