n=int(input())
a = list(map(int,input().split()))
b = list(map(int,input().split()))

lis=[0]*n

for i in range(n):
    if a[i]==b[i]:
        lis[i] = 1
ans=0
cnt=0
for i in range(n):
    if lis[i] == 0:
        cnt=1
        if i == n-1:
            ans+=cnt
        elif lis[i+1] == 0:
            pass
        else:
            ans+=cnt
            cnt=0

print(ans)