import math
n1 = int(input())
a = [int(i) for i in input().split()]
n2 = int(input())
b = [int(i) for i in input().split()]

abun = b[0]
fu = 0
for i in range(n1):
    if a[i] < 0:
        fu += 1

for i in range(n2):
    if b[i] < 0:
        fu += 1

for i in range(1,n1):
    abun *= abs(a[i])
    
bbun = a[0]
for i in range(1,n2):
    bbun *= abs(b[i])
    
tmp = math.gcd(abun,bbun)
if fu % 2 == 1:
    print(-abs(bbun)//tmp,abs(abun)//tmp)
else:
    print(abs(bbun)//tmp,abs(abun)//tmp)