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

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