[评测记录](https://www.luogu.com.cn/record/69903260)
by Usada_Pekora @ 2022-02-23 15:08:17
加上了 `srand(1u*time(NULL))` 又过了一个点。
by Usada_Pekora @ 2022-02-23 15:12:09
写注释时发现`merge` 写错，已ac，此贴终
by Usada_Pekora @ 2022-02-23 15:56:40