#include <fstream>
using namespace std;
int main()
{   ifstream f("fact.in");
    ofstream g("fact.out");
    int aux,c,r,sem,i;
    long p;
    long long n;
    while("!f.eof")
    {f>>p;sem=1;n=1;
    while(sem!=0)
        {for(i=1;i<=n;i++)
            n*=i;
         aux=n;
         r=0;
         while (aux!=0)
            {c=aux%10;
             if(c==0)
                r++;
             aux=aux/10;
            }
        if(r==p)
        {g<<n<<'\n';
         sem=0;
        }
        }
    }
    return 0;
}