#include <fstream>
#include <iostream>

using namespace std;
ifstream in("fact.in");
ofstream out("fact.out");


int main()

{


  int p,tmp = 0;
  in >> p;
  if (p == 0)
    out << 1;
  if ((p+1) % 6 == 0)
  {
      out << -1 << endl;
  }
  else
    {

      tmp = p * 5;
      p = p * 5;
      tmp = p - (p/25)*5;
out << tmp << endl;


}


}