@[LYqwq](/user/399116) 初始化是 $f_i=i$ by Ginger_he @ 2022-03-16 20:09:20
@[Ginger_he](/user/379058) ~~草~~ 谢谢大佬，我是傻逼QwQ by LYqwq @ 2022-03-16 20:27:44