#include <iostream>
using namespace std;

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