def main():
    sign_up_in = input('请输入「注册」或「登录」：')

    if sign_up_in == '注册':
        username = input('请出入用户名：')
        password = input('请出入密码：')
        users.append({
            'username': username,
            'password': password
        })
        print('注册成功')
    elif sign_up_in == '登录':
        username = input('请出入用户名：')
        password = input('请出入密码：')

        if username in err and err[username] >= 3:
            print('失败过多，ban掉：' + username)
            return
        for user in users:
            if username == user['username'] and password == user['password']:
                print('登录成功：' + username)
            else:
                if username in err:
                    err[username] += 1
                else:
                    err[username] = 1
                print('登录失败：' + username + '  ' + str(err[username]) + '次')
    else:
        print('error，必须是 注册 或 密码')


if __name__ == '__main__':
    users = []
    err = {}
    while 1:
        main()