請問
如果有四個人 A B C D
A是B的朋友
A是C的朋友
而C又是D的朋友
那D和B算不算是朋友??

bonbon

bonbon

bonbon

B<->A<->C<->D 所以我猜應該 是 ....改了 所以不是^^

所以說中間"只"夾一個人以下才算是朋友嗎?

The two people will be friends if and only if thereexists a friend struct containing both of their ids.In other words, if we treat the friend struct as edges, then the problems is asking whether two vertices aredirectly connected by an edge

原先sample似乎有錯OAO?

我記得P老師下課前有講朋友的朋友算是朋友

題目的意思是說只有struct friends說是朋友的才是朋友