#include <bits/stdc++.h>
using namespace std;

int main() {
    int N,a,b,c;
    cin >> N;

    c = N % 10;
    b = (N/10)%10;
    a = (N/10)/10;

    if (a == 7 || b == 7 || c == 7){
        cout << "Yes" << endl;
    }else{
        cout << "No" << endl;
    }
}
