n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
cnt = 0
ans = 0
for i in range(n):
    if a[i] == b[i] and cnt >= 1:
        ans += 1
        cnt = 0
    elif a[i] != b[i]:
        cnt += 1
if cnt >= 1:
    ans += 1
print(ans)