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这个和随机算法差不多，因为有可能出现行向量一样实际不一样的，所以行向量也要随机。

Posted by jasonzhu8 at 2010-09-23 00:52:06 on Problem 3318
In Reply To:对AB和C同时左程一个行向量就可以降到O（n^2）了 Posted by:Eli_love at 2010-03-19 21:30:33 
这个和随机算法差不多，因为有可能出现行向量一样实际不一样的，所以行向量也要随机。
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