code: [https://www.luogu.com.cn/paste/o5xdcjxl](https://www.luogu.com.cn/paste/o5xdcjxl) by happybob @ 2022-08-10 13:27:04
这样做就不用求逆元，不需要除法 by happybob @ 2022-08-10 14:16:32