恭喜你完成一个小阶段的学习，接下来是检验学习成果的时候啦！ 😄 😄 (#^.^#)
By signing up a 战码少年-战码青少年编程（专业信息学奥赛编程训练） universal account, you can submit code and join discussions in all online judging services provided by us.
Using your 战码少年-战码青少年编程（专业信息学奥赛编程训练） universal account
