#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");
int p;
int verif(int n)
{
    int v=5,sol=0;
    while(v<=n)
    {
        sol+=n/v;
        v*=5;
    }
    return sol;
}
void caut_bin()
{
   long long st=1,afis=-1,dr=100000001,n,cn;
    while (st<=dr)
    {
    n=(st+dr)/2; cout<<n<<' ';
    cn=verif(n);
    if(cn<p)
            st=n+1;
    if(cn>p)
            dr=n-1;
    if(cn==p)
            {
                afis=n;dr=n-1;
            }
    }
    g<<afis;
}
int main()
{
    f>>p;

    caut_bin();
    return 0;
}