https://www.luogu.com.cn/problem/CF1148H
by chenxinyang2006 @ 2023-10-26 12:23:24
好像是拆贡献
by _zzzzzzy_ @ 2023-10-26 12:24:30
可加贡献一般套路是离线后用数据结构历史和。
by jerry3128 @ 2023-10-26 14:49:22