#include <iostream>
#include <iomanip>
#include <algorithm>
#include <cmath>
using namespace std;

	int main() {
	int n, array[100];
	cin >> n;
	for (int i = 0; i < n; i++)
		if ((array[i] == 2) && (array[i] == 5)) {
			cout << "YES";
			break;
		}
		else {
			cout << "NO";
			break;
		}

	system("pause");
	return 0;