kruskal算法+并查集求最小生成树，16pts，求调，玄关

P3366 【模板】最小生成树

第一个错误，排序应该是 ```cpp sort(l,l+m,cmp);
by huyangmu @ 2024-02-13 20:54:50

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@[s11304](/user/1012470)
by miffy_123 @ 2024-02-13 20:54:54

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thanks,已关
by miffy_123 @ 2024-02-13 20:55:41

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已过，谢谢@[HuYangMu2011](/user/632311) ，此帖结
by miffy_123 @ 2024-02-13 20:57:28

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