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

int main()
{
    int n;
    cin >> n;
    if (n / 100 == 7) cout << "Yes" << endl;
    else if((n%100)/10==7) cout << "Yes" << endl;
    else if(n%10==7)cout << "Yes" << endl;
    else cout << "No" << endl;
    return 0;
}

