线段树优化dp，按照r排序，每次转移就行
by waauto @ 2024-01-13 11:02:36
感觉有点NOIP T4的味道。
by waauto @ 2024-01-13 11:03:03
thx.
by Libingyue2011 @ 2024-01-13 12:08:48
@[waauto](/user/355192) 那怎么实现呢
by Libingyue2011 @ 2024-01-13 20:13:01
hp
by Believe_in_dreams @ 2024-01-16 22:06:42