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没考虑模式0的情况WA了一次……题目所求其实是二分图最大匹配，因为求出匹配后图中的每一条弧的两个定点中至少有一个点被标记为已匹配（如果不是的话那这个匹配就不是最大匹配） Followed by: Post your reply here: |
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