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如果kruskal一直错的这只是我的一点认识。我用的是kruskal，一直都是wa，后来ac了 可以试试这个测试数据 1 6 7 1 3 1 1 2 2 2 3 3 3 4 0 4 5 4 4 6 5 5 6 6 就是说，如果次小生成树不连通且被你删的边恰好是权值为0的情况 今天一早发现的，今天我生日，运气果然好，哈哈，趁着这个好日子，多做几题 Followed by:
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