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

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