[here](https://www.luogu.org/problemnew/show/P4512) by ferrum_cccp @ 2019-06-25 13:01:55
@[wycero](/space/show?uid=72665) 多项式除法和高精度取模还是不一样的吧 by 单曦增 @ 2019-06-25 13:08:54