#include<fstream.h>
int main()
{
	ifstream fin("fact.in");
	ofstream fout("fact.out");
	unsigned long int i=0,x=0,f,p;
	fin>>p;
	while(x<p)
	{
		i++;
		f=i*5;
		while(f%5==0)
		{	
			x++;
			f=f/5;
		}
	}
	if(p==0)
		fout<<0;
	if(x==p && p!=0)
		fout<<" "<<i*5;
	else
		fout<<"-1";
	return 0;
}