#include <cstdio>
#include <vector.h>
int main()
{
	frefreopen("fact.in","r",stdin);
	freopen("fact.out","w",stdout);
	
	int p,x=0,i=0,aux;
	char null [100];
	scanf ("%d",&p);
	for (int i=0;i<100;i++)
		null[i]=0;
	while (strlen(null)<p)
	{
		x+=5;
		aux=x;
		while (aux%5==0)
		{
			aux/=5;
			null[i]=5;
			i++;
		}
	}
	
	if (strlen(null)==p)
		printf ("%d \n",x);
	else
		printf ("-1 \n");
	

}