#include <iostream>
#include <fstream>
using namespace std;
ifstream in("fractii.in");
ofstream out("fractii.out");
int main()
{
    int n,j,q=1,p=1,nr=0,i=0,aux,s=0;
    float a[1000000];
    in>>n;
    while (nr=0)
    {
        i++;
        j=1;
        aux=0;
        a[i]=p/q;
        while (j<=i&&aux==0)
        {
            if (a[j]=a[i])
                aux=1;
            j++;
        }
        if (aux=0)
          s++;
        if (p=n)
        {
            p=0;
            q++;
        }
        p++;
        if (q=n)
            nr=1;
    }
    out<<s;
}