#include<iostream>
#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int main()
{
    int n,i,j,x,y,m;
    m=0;
    f>>n;
    f.close();
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            x=i;
            y=j;
            while(x!=y)
            {
            if(x>y)
            x=x-y;
            else
            y=y-x;
            }
            if(x==1)
            {

                g << i << "/" << j << " ";
            m++;

            }

        }
    }
    g << "\n";
    g << m;

    g.close();
}