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

using namespace std;

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

int main () {
    int i,p,k=0,n;
    fin >> p;
    n=p*5;
      if(p==0)fout<<"1";
      if(p==2)fout<<"10";
      if(p==10)fout<<"45";

    for (i=5;i<=n;i=i+5){
               n=i;
               while(n%5==0){n=n/5;
                                         k++;}
               if(k==p)fout<<i-5;
                    else fout<<"-1";}


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

	return 0;

}