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hdu 3729 I'm Telling the Truth(二分匹配_ 匈牙利算法)

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Problem Description After this year’s college-entrance exam, the teacher did a survey in his class on students’ score. There are n students in the class. The students didn’t want to tell their teacher their exact score; they only told their teacher their rank in the province (in the form of intervals).After this year’s college-entr


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