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Re:我构造的矩阵有一个特点。每一列只有一个元素算非0，所以乘法是n*n的，但是WA，能给个数据么？In Reply To:可是你的程序运行时间明显比我短很多哎，有什么特殊优化么？ Posted by:Ikki at 2009-05-17 18:52:29 Followed by:
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