是`if(father(a[i].x)!=father(a[i].y))`
by chengch @ 2021-08-04 23:43:37
@[泪湿春衫袖](/user/467683)
by chengch @ 2021-08-04 23:46:26
@[cchhh](/user/143301) 哦，我打错了。谢谢！
by return_CE @ 2021-08-05 18:30:09
@[cchhh](/user/143301) 那五个点也不知道咋过的
by return_CE @ 2021-08-05 18:31:17