最小生成樹（Krushal算法）

個人認爲如果學過並查集的話，Krushal要比prim好用點，基本看到就會的那種 下面用poj1251這道題來入門學習一下 題目描述 The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extra roads between villa

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