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题目数据非常水,那些bt数据完全不用管,小的数据过了也基本能过了

Posted by neverchanje at 2014-02-16 00:35:00 on Problem 1011
剪枝什么的才剪到一半,想说先试看看,没想到就过了
一开始也因为没注意n==1的情况wa了两次

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