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根据标准构造法,是不会有NO的情况的。

Posted by cloudygoose at 2009-03-03 22:44:09 on Problem 2201
In Reply To:WA了。不理解什么时候会NO的?感觉自己的算法没问题。 Posted by:Jin_j_y at 2005-04-05 16:26:40
你的方法应该没错,看看是不是没考虑负数。

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