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

c = []
same = True
ans = 0
for i in range(n):
    if (a[i] == b[i]):
        same = True
    else:
        if (same == True):
            same = False
            ans += 1

print(ans)