#include <bits/stdc++.h>
#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;

int main()
{
    ll n, b, e;
    cin >> n >> b;
    for (int i = 1; i < n; i++){
        cin >> e;
    }
    cout << e << "/" << b << endl;
}