import sys
input=lambda: sys.stdin.readline().rstrip()
n1=int(input())
A=[int(i) for i in input().split()]
n2=int(input())
B=[int(i) for i in input().split()]
sig=0
num,den=A[0],B[0]
for i,a in enumerate(A):
  if a<0:
    sig+=1
  if i!=0:
    den*=abs(a)
for i,a in enumerate(B):
  if a<0:
    sig+=1
  if i!=0:
    num*=abs(a)
def gcd(a,b):
  while b:
    a,b=b,a%b
  return a
d=gcd(den,num)
den//=d
num//=d
if sig%2==1:
  num=-num
print(num,den)