每次合并两个?
我比较假
by little_gift @ 2018-11-21 20:10:38
建虚树可以倍增做
by zhoutb2333 @ 2018-11-22 17:40:34
可能可以虚树吧
by GKxx @ 2018-11-27 23:06:37
反正ddp是一定可以的
by GKxx @ 2018-11-27 23:06:55
好像裸的倍增dp也可以做……
by PurpleWonder @ 2018-11-29 13:44:34