n = int(input())

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

cnt = 0

for i in range(n):
    if (a[i] != b[i]):
        if (i == 0 or (i != 0 and a[i - 1] == b[i - 1])): cnt += 1

print(cnt)