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

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