# include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 100; 
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n;
	cin >> n;
	if(n % 10 == 7 || (n / 10) % 10 == 7 || n / 100 == 7){
		cout << "Yes\n";
	}else{
		cout << "No\n";
	}
}