mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N = int(input())
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))

    ans = 0
    flg = 0
    for a, b in zip(A, B):
        if flg == 0:
            if a != b:
                flg = 1
        else:
            if a == b:
                flg = 0
                ans += 1
    if flg == 1:
        ans += 1
    print(ans)


if __name__ == '__main__':
    main()