注：105=10^5 109=10^9 106=10^6 by wangzl @ 2021-04-09 21:03:23
~~我们今天%你赛考了它~~ [你谷有这道题](https://www.luogu.com.cn/problem/U170132) by Aranea晨曦 @ 2021-11-10 13:59:38