#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("fractii.in");
ofstream fout("fractii.out");
int main()
{
    int n;
    fin>>n;
    int k=0;
    float d,d2;
    for(float i=1;i<=n;i++)
        for(float j=1;j<=n;j++)

            {
              d=i/j;
              d2=j/i;
                if((d-int(d)&&d2-(int)d2)||j==1||i==1)
                    {cout<<d<<endl;cout<<i<<"/"<<j<<endl<<endl;
                    k++;
                    }


}
fout<<k;}