#include <iostream>
using namespace std;

struct Fraction
{
	int numerator;
	int denominator;
	Fraction* next;

	Fraction(int numerator, int denominator, Fraction* next)
	{
		this->numerator = numerator;
		this->denominator = denominator;
		this->next = next;
	}

	Fraction () {}
};

int main()
{
	Fraction last = Fraction(1, 1, NULL);
	Fraction first = Fraction(0, 1, &last);
	Fraction* array[100] = {};
	array[0] = &first;
	array[1] = &last;
	for (int i = 2; i < 100; i++)
		array[i] = 0;
	int n;
	cin >> n;
	int newFractionPosition = 2;
	for (int i = 2; i <= n; i++)
	{
		Fraction* current = &first;
		while (current->next != NULL)
		{
			if (current->denominator + current->next->denominator == i)
			{
				int newFractionNumerator = current->numerator + current->next->numerator;
				int newFracTionDenominator = current->denominator + current->next->denominator;
				Fraction* newFraction = new Fraction(newFractionNumerator, newFracTionDenominator, current->next);
				current->next = newFraction;
				array[newFractionPosition++] = newFraction;
			}
			current = current->next;
		}
	}
	Fraction* current = array[0];
	while (current != NULL)
	{
		cout << current->numerator << " / " << current->denominator << endl;
		current = current->next;
	}

}