Leetcode 100. Same Tree

文章作者：Tyan
博客：noahsnail.com  |  CSDN  |  简书

1. Description

Same Tree

2. Solution

• Recurrent

/**
 * Definition for a binary tree node.
 * 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) {
        if(!p && !q) {
            return true;
        }
        else if((!p && q) || (p && !q)) {
            return false;
        }
        if(p->val != q->val) {
            return false;
        }
        return isSameTree(p->left, q->left) && isSameTree(p->right, q->right);
    }
};

Reference

1. https://leetcode.com/problems/same-tree/description/