n = int(input())
alst = list(map(int, input().split()))
blst = list(map(int, input().split()))
ans = 0
flg = False
for a, b in zip(alst, blst):
    if (a != b) and (not flg):
        ans += 1
        flg = True
    elif a == b:
        flg = False
print(ans)