import sys

sys.setrecursionlimit(10 ** 6)
stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().strip()
nsa = lambda: list(stdin.readline().split())
mod = 10 * 7 + 7

n = ni()
A = na()
B = na()

flag = 1
ans = 0



for i in range(n):
    if i == 0:
        if A[i] == B[i]:
            flag = 0
    else:
        if A[i] == B[i]:
            if flag:
                ans += 1
                flag = 0
        else:
            flag = 1

if flag:
    ans += 1

print(ans)