@[touristWang](/space/show?uid=71155) 已采纳
by yjjr @ 2018-03-11 09:39:37
($ 2 \le n \le 2 \times 10^5, n - 1 \le m \le 2 \times 10^5$)
Tex打挂了，麻烦修改一下
@ yjjr
by touristWang @ 2018-03-11 13:47:40
@[yjjr](/space/show?uid=5088)
by touristWang @ 2018-03-11 13:47:49
@[touristWang](/space/show?uid=71155) fixed
by yjjr @ 2018-03-11 14:14:00