[LeetCode] Same Tree, Solution

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.

» Solve this problem

[Thoughts]
递归判断左右子树是否相等。

[Code]

1:    bool isSameTree(TreeNode *p, TreeNode *q) {  
2:      if(!p && !q) return true;  
3:      if(!p || !q) return false;  
4:      return (p->val == q->val) &&  
5:           isSameTree(p->left, q->left) &&   
6:           isSameTree(p->right, q->right);      
7:    }