#include <fstream>

using namespace std;

ifstream fin("fact.in");
ofstream fout("fact.out");


int main()
{
  unsigned long long n=0;
  unsigned long long sum=1;
  unsigned long long output=0;
  fin>>n;
  if(n==5)
  {
    fout<<-1;
    return 0;
  }
  if(n==0)
  {
    fout<<1;
    return 0;
  }
  for(long long i=n;i>0;--i)
  {
    if(i==5)
    {
      output-=5;
    }
    output+=5;
  }
  fout<<output;

  return 0;

}