The example code which I work with in ZOJ of ZHKU.

This is only for study. Do not use in ZOJ or any other way. You know the code written by yourself is the most interesting and the proudest thing you have done.

当然的，作为一个摸鱼佬外加痛苦大学生，我肯定是有copy网上的代码的，所以emmm这些也不全是我写的(但大部分都是我自己写的)，over。