百度一下
by Victorique_De_Blois @ 2019-10-29 13:19:42
百度，请
by x义x @ 2019-10-29 13:20:11
道[模板题](https://www.luogu.org/problem/P3811)里面找一个[题解](https://www.luogu.org/problemnew/solution/P3811)看看？
by JerryZheng @ 2019-10-29 13:21:22
~~厚颜无耻地~~推荐一下[luogu日报](https://www.luogu.org/blog/1239004072Angel/post-shuo-xue-sheng-fa-ni-yuan)QwQ
by Nickel_Angel @ 2019-10-29 13:51:30