#include<iostream>
#include<cmath>
#include<fstream>

using namespace std;

ifstream fin("fact.in");
ofstream fout("fact.out");

int main () {
    int n,i,p=1,c;
      fin >> n;
      for (i =1;i<=n;i++){
	           p=p*i;}

     while(p){c=p%10;
                          p=p/10;
                          if(c==0)fout<<p;
                              else fout<<"-1";}


	fin.close();
	fout.close();

	return 0;

}