#include <iostream>
#include <fstream>
#include <math.h>

using namespace std;
int main()
{
    long p,fact=1,ok=1,n=1;
    ifstream f("fact.in");
    f>>p;
    if(p==0) ok=0;
    while (ok==1)
    {
        n=n+1;;
        fact=fact*n;
        int a=(int) pow(10,p);
        cout<<a;
        if(fact % a==0) ok=0;

    }
    ofstream g("fact.out");
    g<<n;
    return 0;
}