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.
解题代码:
/**
* Definition for binary tree
* struct TreeNode {
* int val;
* TreeNode *left;
* TreeNode *right;
* TreeNode(int x) : val(x), left(NULL), right(NULL) {}
* };
*/
class Solution {
public:
bool isSameTree(TreeNode *p, TreeNode *q)
{
return p ? ( q && p->val == q->val && isSameTree(p->left,q->left) && isSameTree(p->right,q->right)) : (q == 0) ;
}
};
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