@[E_Space](/user/7528) @[Alex_Wei](/user/123294)
by __er @ 2023-02-07 20:06:14
？
https://www.luogu.com.cn/blog/Kelin/solution-p2147
这东西都能过审？
by scp020 @ 2023-02-07 20:13:40
@[_RSY_](/user/46197)
by scp020 @ 2023-02-07 20:13:53
一句话题解不是很多吗
by SDqwq @ 2023-02-07 20:14:29
自己都写着“水一发”
by scp020 @ 2023-02-07 20:16:12
。虽然一眼可以线段树分治+带撤销单按秩合并并查集，但直接上并查集也太假了。。
by E.Space @ 2023-02-07 21:03:24
已撤掉部分题解。
by E.Space @ 2023-02-07 21:42:29