// #define _GLIBCXX_DEBUG // for STL debug (optional)
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <string>
#include <cstring>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <utility>
#include <algorithm>
#include <map>
#include <set>
#include <complex>
#include <cmath>
#include <limits>
#include <cfloat>
#include <climits>
#include <ctime>
#include <cassert>
#include <numeric>
#include <fstream>
#include <functional>
#include <bitset>
using namespace std;

#define debug(...) fprintf(stderr, __VA_ARGS__)
#define int long long int
 
template<typename T> void chmax(T &a, T b) {a = max(a, b);}
template<typename T> void chmin(T &a, T b) {a = min(a, b);}
template<typename T> void chadd(T &a, T b) {a = a + b;}
 
typedef pair<int, int> pii;
typedef long long ll;
 
int dx[] = {0, 0, 1, -1};
int dy[] = {1, -1, 0, 0};
const ll INF = 1001001001001001LL;
const ll MOD = 1000000007LL;

int gcd(int a, int b) {
    return b == 0 ? a : gcd(b, a%b);
}

signed main() {
    int N, M;
    int cntN = 0;
    int A = 1, B = 1;
    
    cin >> N;
    for(int i=0; i<N; i++) {
        int val; cin >> val;
        cntN += (val < 0);
        val = abs(val);
        if(i == 0) A *= val;
        else B *= val;
    }
    cin >> M;
    for(int i=0; i<M; i++) {
        int val; cin >> val;
        cntN += (val < 0);
        val = abs(val);
        if(i % 2 == 0) B *= val;
        else A *= val;
    }

    /*
    auto fa = make_fraction(vec1, 0, N, 1);
    auto fb = make_fraction(vec2, 0, M, 2);

    int A = 1, B = 1;
    A = fa.first * fb.second;
    B = fa.second * fb.first;
    */
    int g = gcd(A, B);
    A /= g, B /= g;
    if(cntN % 2) A *= -1;
    printf("%lld %lld\n", A, B);
    return 0;
}