#include<cstdio>
#include<fstream>
using namespace std;
int main()
{int n,p,i,r,a,k;
ifstream f("fact.in");
ofstream g("fact.out");
f>>p;
i=0;
do
{n=i;
	r=0;
k=0;
	do
	{if (n%2==0)
	{	k++;
        n=n/2;}
		
	if (i%5==0)
		{r++;
		 n=n/5;}}
	while((n%2==0)||(n%5==0));
	i++;}
while((k!=p)&&(r!=p));
if ((k==p)||(r==p))
	g<<n<<"\n";
else
	g<<-1<<"\n";
f.close();
g.close();}