#include<fstream>
using namespace std;
int main()
{int a,p=0,n,i,j,pb=0;
ifstream f("fact.in");
ofstream g("fact.out");
f>>p;
pb=1;
i=5;
while(pb<p)
{i=i+5;
j=i;
pb=pb+1;
if(i%25==0)
pb=pb+1;
if(i%125==0)
pb=pb+1;
if(i%625==0)
pb=pb+1;
if(i%3125==0)
pb=pb+1;
if(i%15625==0)
pb=pb+1;}
if(pb==p)
g<<i;
else
g<<-1;
f.close();
g.close();
return 0;}