详情见

以下几篇有误

https://www.luogu.com.cn/blog/ButterflyDew/solution-p1136

https://www.luogu.com.cn/blog/derren/solution-p1136

https://www.luogu.com.cn/blog/IAmHellWord/solution-p1136

https://ctj12461.blog.luogu.org/883e12d