#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int main()
{
    int n, i, j, nr=0;
    f>>n;
    for (i=1; i<=n; i++)
        for (j=1; j<=n; j++)
        {if ((i%j != 0 && j%i !=0) || j==1 ) {nr++; g<<i<<"/"<<j<<" "; }
        g<<endl;
        }
    g<<endl<<nr;
    return 0;
}