感觉上这题简单些，但代码长度让人瑟瑟发抖
by Forward_Star @ 2018-12-09 19:00:38
@[Forward_Star](/space/show?uid=21760) 第六分块我还写了11kb呢。。
by noip @ 2018-12-09 23:06:20
@[Forward_Star](/space/show?uid=21760) 老哥数据范围（
by Juan_feng @ 2018-12-14 20:53:34