#include <iostream>
#include <fstream>
#include <vector>
#include <map>
#include <algorithm>

using namespace std;

int main(void) {
	std::ios::sync_with_stdio(false);
	std::cin.tie(0);
	std::cout << std::fixed;
	int N, last, first;
	cin >> N;
	cin >> first;
	while (cin >> last);
	cout << last << "/" << first << endl;
}