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

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