#include <iostream>
#include<fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
float n,i,j,nr=0,ok,x,y;
int main()
{
    fin>>n;
    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){
            nr++;
    fout<<i<<"/"<<j<<" ";}}
    fout<<endl<<nr;

    return 0;
}