/**
	Programul este facut in Microsoft Visual Studio.
	Sterge libraria 'pch.h' ca sa functioneze in CodeBlocks.
*/
#include <iostream>

using namespace std;

int prim(int numarator, int numitor)
{
	int x;
	while (numitor)
	{
		x = numarator % numitor;
		numarator = numitor;
		numitor = x;
	}
	if (numarator == 1)
		return 1;
	return 0;
}

int main()
{
	int fractii = 0, n;
	cin >> n;
	for (int i = 1; i <= n; i++)
		for (int j = 1; j <= n; j++)
			if (prim(i, j))
			{
				fractii++;
				cout << i << '/' << j << '\n';
			}

	cout << "Exista " << fractii << ".\n";
}