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呼。。。终于过了，反思：用HALL定理做这题也得根据这道题的特点做必要的优化的。In Reply To:我用的是判断完美匹配是否存在的HALL定理,可是一直TLE,不知道过了的大牛们怎么个思路啊,请教!!! Posted by:goalboy at 2005-12-15 15:35:39 Followed by:
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