import sys
input=sys.stdin.readline
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))

def main():
    mod=10**9+7
    N=I()
    S=LI()
    T=LI()
    
    s2=S.count(2)
    t2=T.count(2)
    
    ans=s2*N + t2*N - (s2*t2)
    
    s1=S.count(1)
    t1=T.count(1)
    
    if s2!=0:
        t1=0
        
    if t2!=0:
        s1=0
    
    ans+=max(s1,t1)
    
    print(ans)
    

    
    


main()