#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
#include<cmath>
typedef long long  ll;
typedef long double lb;
using namespace std;
int main() {
       	int a;
 		 cin >> a;
        if (a%10== '7') cout << "Yes";
        else if ((a/10)%10 == '7')cout << "Yes";
        else if (a/100 == '7')cout << "Yes";
        else cout << "No";
    }
