Orz
by Lieyiqi @ 2023-08-18 08:10:32
确实
by Slash_Thunder @ 2023-08-18 08:11:24
感谢
by jasonshen_ @ 2023-08-18 08:58:27
补：如果你 WA 85 pts
请注意阶乘和逆元的预处理范围是 $0\le fac/inv \le n+1$ 一定要处理 $0$ 和 $n+1$
~~也就我 sb 只预处理到 $n$ 。~~
by xrlong @ 2023-08-18 15:47:07
@[xrlong](/user/630778) 还有幂次
by xrlong @ 2023-08-18 15:48:15