#include<iostream>
#include<fstream>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");
int main ()
{
    int p,k,aux,aux2=0,plm;
    f>>p;
    aux=1;
    k=5;
    plm=0;
    if(p==0)
    g<<1;
    else
    while(aux2==0)
    {
                  if(p==k)
                  {
                  aux2=1;
                  g<<-1;}
                  else
                  {
                  if(p>k)
                  {
                         if(aux<5)
                         {aux=aux+1;
                          k=k+6;
                          plm=plm+1;}
                          else
                          {
                          plm=plm+1;
                          aux=1;
                          if(k==29)
                          k=k+1;
                          }
                  }
                  else
                  {
                  p=p-plm;
                  g<<p*5;
                  aux2=1;
                  }
                  }
}
system("pause");
f.close();
g.close();
return 0;
}