@[a1943517355](/user/270977)
$O(n*\log n)$不TLE就有鬼了
by Smile_Cindy @ 2020-08-12 13:54:43
虽然确实有人exgcd过了。
by Smile_Cindy @ 2020-08-12 13:54:58
@[Alpha](/user/87058) 谢谢！
by a1943517355 @ 2020-08-12 13:56:19