n = int(input())
A = list(map(int,input().split()))
B = list(map(int,input().split()))
ans = 0
on = 0
for i in range(n):
    if A[i] == B[i]:
        if on == 1:
            ans += 1
            on = 0
    else:
        on = 1
if on == 1:
    ans += 1
print(ans)