存反了吧，你这 $pp$ 不是先排 $first$ 再排 $second$ 的吗
by s1mp1ng @ 2024-03-27 20:46:29
我帮你反过来就过了：
[记录](https://www.luogu.com.cn/record/152975037)
by s1mp1ng @ 2024-03-27 20:48:51
@[s1mp1ng](/user/1093247) 还是好人多啊
by Mostly_Harmless @ 2024-03-28 00:45:35