LeetCode 100. Same Tree

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解题思路:树的递归

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


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