#include <iostream>

using namespace std;

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