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