**+1**
by LittlePrincess @ 2018-03-31 18:14:43
+1qwq
by Foehn_Pioneer @ 2018-10-30 10:52:48
还有这一点儿也不19$****$17
by Foehn_Pioneer @ 2018-10-30 10:59:00
以为是素数+1
~~但是我很快反应过来了然后大力枚举找逆元~~
by 青君 @ 2020-01-18 10:06:06