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