Solution -「HNOI 2010」城市建设
DescriptionLink.修改边权的动态 MST。Solution讲清楚点。修改边权的 MST,考虑对时间分治。设我们当前操作的操作区间是 $[l,r]$,直接暴力找 MST 是不行的。考...
In mathematics you don't understand things, you just get used to them.
In mathematics you don't understand things, you just get used to them.