#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("fact.in");
ofstream fout ("fact.out");
unsigned long long a[14],b[14],c[14],i,x,suma;
int main()
{
 a[1]=1;
 b[1]=1;
 for(i=2;i<=13;i++)
   {
       a[i]=a[i-1]*5;
       b[i]=b[i-1]*5+1;
   }
   fin>>x;
   if(x==0)
   {
       fout<<1;
       return 0;
   }
   for(i=1;b[i]<=x;i++);
   i--;

   while(x!=0)
   {
       if(b[i]>x)
          i--;
       if(b[i]<=x)
       {
           suma += a[i]*5;
           x -= b[i];
           c[i]++;
           if(c[i]==5)
           {
               fout<<-1;
               return 0;
           }
       }
   }
  fout<<suma;
}