空间限制 :4MB
by Viston @ 2018-11-06 14:39:48
emmmmm看一下[这个帖子](https://www.luogu.org/blog/Chanis/master)吧,,要会计算时空复杂度的奥
by 杨小艾 @ 2018-11-06 14:45:32
@[杨小艾](/space/show?uid=138398) 谢谢dalao
by 做梦都想AK @ 2018-11-06 15:40:38