https://www.luogu.com.cn/blog/359113/p9166-xie-ti-bao-gao https://www.luogu.com.cn/blog/396146/p9166-xing-xuan-lian-kao-2023-huo-ju-zhan-tj https://www.luogu.com.cn/blog/osfly/solution-p9166
Hack 数据：
4 2 1 1 2 2 4
3
