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不愧是usaco上面的题目不愧是usaco上面的题目，将匹配问题做的这么隐晦。主要是明白什么是边，什么是点，我们的目标是什么：边最少？点最少？最少点覆盖，最少边覆盖。 Followed by: Post your reply here: |
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