n = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))

ans = 0
miss_flag = True
for i in range(n):
    if A[i] == B[i]:
        if not miss_flag:
            ans += 1
        miss_flag = True
    else:
        miss_flag = False
        if i == n - 1:
            ans += 1
print(ans)