［AtCoder］ABC-401｜B - Unauthorized

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• 🔗ABC-401 B - Unauthorized

提出結果

def getInt():
    return int(input())


def getStringRow(N):
    return [input() for _ in range(N)]


def main():
    N = getInt()
    S = getStringRow(N)

    stat = 0
    error = 0
    for a in S:
        if a == "login":
            stat = 1
        elif a == "logout":
            stat = 0
        elif a == "public":
            pass
        elif a == "private":
            if stat == 0:
                error += 1
    print(error)


if __name__ == "__main__":
    main()