@zybnxy https://www.luogu.org/blog/51645/qian-tan-namespace 感谢投稿，过于基础

@Hjl1777 https://www.luogu.org/blog/user77612/qian-tan-bing-zha-ji 感谢投稿，过于基础

那个东西我也觉得有点奇怪