https://www.luogu.com.cn/discuss/show/131464
by wzmzmhk @ 2021-07-24 10:09:52
不至于吧
by Ender32k @ 2021-07-24 10:13:32
不至于
by Echidna @ 2021-07-24 10:14:51
其实加强一下不放$O(nk^2)$可以是绿，参考
P6394 樱花，还有你
by 紊莫 @ 2022-10-07 15:30:59
绿题不至于，洛谷把O(nk²）加上了，不放可以是普及+
by Kibutsuji_Muzan @ 2023-07-06 13:56:05