并查集写错了
by do_while_true @ 2020-07-11 22:18:49
@[do_while_true](/user/223298) 谢谢了，`int f=find(edge[l].from),t=find(edge[l].to);`这句也改了，但是又RE+WA了...
by LuomuQDM @ 2020-07-11 22:23:11
发现问题了，此贴终
by LuomuQDM @ 2020-07-11 22:24:53