import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
S=[int(i) for i in input().split()]
T=[int(i) for i in input().split()]

if max(S)==2 and max(T)==2:
	s,t=S.count(2),T.count(2)
	print((s+t)*n-s*t)
elif max(S)==2:
	print(S.count(2)*n+S.count(1))
elif max(T)==2:
	print(T.count(2)*n+T.count(1))
else:
	s,t=S.count(1),T.count(1)
	print(max(s,t))