直接做区间筛嘛
by 年年有年 @ 2021-08-20 08:51:51
区间筛啊![qq_emoji: qd](https://xn--9zr.tk/qd)
by 绝顶我为峰 @ 2021-08-20 08:53:12
不要怀疑一道 **通过 549** 的题目。
by 言琢დ @ 2021-08-20 08:53:40
@[Znloye](/user/50606) 你这话就不对了,事实上,题解用 dfs 的死了一大片
by 年年有年 @ 2021-08-20 08:55:01
@[damocris](/user/119884)
@[年年有年](/user/377973) [提问的智慧](https://studyingfather.blog.luogu.org/how-to-ask-questions-the-smart-way-luogu-edition)
拿走不谢。猴子们。
by 言琢დ @ 2021-08-20 08:55:39
@[Znloye](/user/50606) 一言不合直接说人猴子![qq_emoji: kx](https://z3.ax1x.com/2021/05/30/2VYvAs.png)
以及蓝名是小号![qq_emoji: kx](https://z3.ax1x.com/2021/05/30/2VYvAs.png)
by 绝顶我为峰 @ 2021-08-20 08:56:54
![qq_emoji: cg](https://z3.ax1x.com/2021/05/30/2VJxSK.png)
by 绝顶我为峰 @ 2021-08-20 08:57:39
![](https://z3.ax1x.com/2021/05/30/2VJxSK.png)
by 言琢დ @ 2021-08-20 08:58:07
![cg.gif](https://i.loli.net/2021/08/18/YWRBCFsQTjHg16N.gif)?
by 约瑟夫用脑玩 @ 2021-08-20 09:00:55
这波操作 属实给我整不会了![qq_emoji: my](https://z3.ax1x.com/2021/05/30/2VtGEd.png)
by 绝顶我为峰 @ 2021-08-20 09:02:19