#include <iostream>

using namespace std;

int main() {

	int N;

	cin >> N;

	int hundred = N / 100;
	int ten = (N - hundred * 100) / 10;
	int one = (N - hundred*100 - ten*10);

	if(hundred == 7 || ten == 7 || one == 7) {
		cout << "Yes" << endl;
	} else {
		cout << "No" << endl;
	}
}