import static java.lang.Math.*; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.PrintWriter; import java.util.InputMismatchException; import java.util.StringTokenizer; public class Main { public static void main(String[] args) throws IOException { InputStream inputStream = System.in; OutputStream outputStream = System.out; InputReader in = new InputReader(inputStream); PrintWriter out = new PrintWriter(outputStream); TaskX solver = new TaskX(); solver.solve(1, in, out); out.close(); } static int INF = 1 << 30; static long LINF = 1L << 55; static int MOD = 1000000007; static int[] mh4 = { 0, -1, 1, 0 }; static int[] mw4 = { -1, 0, 0, 1 }; static int[] mh8 = { -1, -1, -1, 0, 0, 1, 1, 1 }; static int[] mw8 = { -1, 0, 1, -1, 1, -1, 0, 1 }; static class TaskX { public void solve(int testNumber, InputReader in, PrintWriter out) { int n = in.nextInt(); int[] a = in.nextIntArray(n); int m = in.nextInt(); int[] b = in.nextIntArray(m); int count = 0; P bunsi = new P(1, 1), bunbo = new P(1, 1); for (int i = 0; i < n; i++) { if (a[i] < 0) count++; if (i == 0) { bunsi.bunsi *= abs(a[i]); } else { bunsi.bunbo *= abs(a[i]); } } for (int i = m-1; i >= 2; i--) { b[i-2] *= b[i]; } bunbo.bunsi = b[0]; bunbo.bunbo = b[1]; long si = bunsi.bunsi * bunbo.bunbo; long bo = bunsi.bunbo * bunbo.bunsi; long g = gcd(si, bo); out.printf("%d %d\n", si / g * (count % 2 == 1 ? -1 : 1), bo / g); } } public static long gcd(long a, long b) { return (b == 0) ? a : gcd(b, a % b); } static class P { int bunsi, bunbo; public P(int bunsi, int bunbo) { super(); this.bunsi = bunsi; this.bunbo = bunbo; } @Override public String toString() { return "P [bunsi=" + bunsi + ", bunbo=" + bunbo + "]"; } } static class InputReader { BufferedReader in; StringTokenizer tok; public String nextString() { while (!tok.hasMoreTokens()) { try { tok = new StringTokenizer(in.readLine(), " "); } catch (IOException e) { throw new InputMismatchException(); } } return tok.nextToken(); } public int nextInt() { return Integer.parseInt(nextString()); } public long nextLong() { return Long.parseLong(nextString()); } public double nextDouble() { return Double.parseDouble(nextString()); } public int[] nextIntArray(int n) { int[] res = new int[n]; for (int i = 0; i < n; i++) { res[i] = nextInt(); } return res; } public int[] nextIntArrayDec(int n) { int[] res = new int[n]; for (int i = 0; i < n; i++) { res[i] = nextInt() - 1; } return res; } public int[] nextIntArray1Index(int n) { int[] res = new int[n + 1]; for (int i = 0; i < n; i++) { res[i + 1] = nextInt(); } return res; } public long[] nextLongArray(int n) { long[] res = new long[n]; for (int i = 0; i < n; i++) { res[i] = nextLong(); } return res; } public long[] nextLongArrayDec(int n) { long[] res = new long[n]; for (int i = 0; i < n; i++) { res[i] = nextLong() - 1; } return res; } public long[] nextLongArray1Index(int n) { long[] res = new long[n + 1]; for (int i = 0; i < n; i++) { res[i + 1] = nextLong(); } return res; } public double[] nextDoubleArray(int n) { double[] res = new double[n]; for (int i = 0; i < n; i++) { res[i] = nextDouble(); } return res; } public InputReader(InputStream inputStream) { in = new BufferedReader(new InputStreamReader(inputStream)); tok = new StringTokenizer(""); } } }