本题题目要求如下:
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.
本题就是dfs遍历。。没啥太多好解释的。。最简单的题之一。。直接上代码:/**
* 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 == nullptr and q == nullptr) {
return true;
}
if (p == nullptr or q == nullptr) {
return false;
}
if (p->val == q->val) {
return isSameTree(p->left, q->left) and isSameTree(p->right, q->right);
}
return false;
}
};