#include <bits/stdc++.h>
using namespace std;
struct TreeNode
{
	int val;
	TreeNode *left;
	TreeNode *right;
	TreeNode() : val(0), left(nullptr), right(nullptr) {}
	TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
	TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
};
class Solution
{
public:
	bool isSameTree(TreeNode *p, TreeNode *q)
	{
		if (p == nullptr && q == nullptr)
		{
			return true;
		}
		if (p == nullptr || q == nullptr)
		{
			return false;
		}
		if (p->val != q->val)
		{
			return false;
		}
		return isSameTree(p->left, q->left) && isSameTree(p->right, q->right);
	}
};