另一种等价写法：
$$ax^2+bx\equiv 1\pmod{c}$$
by yummy @ 2019-12-14 16:25:00
看$delta=b^2-4acy+4a$，枚举$y$就行了吧
by peppaking8 @ 2019-12-14 16:25:38
@[用户未知](/user/146478) 可是...所有数字都是longlong范围内的
by yummy @ 2019-12-14 16:27:48
这样解的话我还不如枚举x
by yummy @ 2019-12-14 16:28:41
优化枚举
by btng_smith666 @ 2019-12-14 16:30:28
配方，然后二次剩余
by 小粉兔 @ 2019-12-14 16:40:15
@[小粉兔](/user/10703) 膜兔
by disangan233 @ 2019-12-14 16:43:22
@[小粉兔](/user/10703) %兔+THX
by yummy @ 2019-12-14 16:48:06
话说前一阵子我们珂学老师拿动物毛皮和橡胶棒摩擦...感觉有点珂怕
by yummy @ 2019-12-14 16:52:04
@[yummy](/user/101694) 我们上化学实验课一旁的dalao拿玻璃棒擦头发还让水龙头的水流偏移了
by VinstaG173 @ 2019-12-14 16:56:26