# **算的**
（以前我也被坑过
by wisdom_grass @ 2018-03-10 17:53:32
https://www.luogu.org/discuss/show?postid=18634
这位大佬已经解释地很详细了
= =
by a13518354766 @ 2018-03-10 18:31:55
谢谢
by dongjiajiedc @ 2018-03-11 18:33:21