n = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
ans = 0
tmp = 0
for a, b in zip(A, B):
	if a != b:
		tmp += 1
	else:
		if tmp > 0:
			ans += 1
			tmp = 0
if tmp > 0:
	ans += 1
print(ans)