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

int main(){
    int N;
    cin >> N;
    int a, b, c;
    a = N/100;
    b = (N - a*100)/10;
    c = (N - a * 100 - b * 10);
    if (a == 7 || b == 7 || c == 7)  cout << "Yes" << endl;
    else cout << "No" << endl;
}