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

int main() {
  int N;
  cin >> N;

  if (N%10 == 7) {
    cout << "Yes" << endl;
  }
  else if (N/100 == 7) {
    cout << "Yes" << endl;
  }
  else if ((N/10)%10 == 7) {
  cout << "Yes" << endl;
  }
  else cout << "No" << endl;
}
