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Re:what is the answer ..?

Posted by new_begin at 2009-08-23 17:48:52 on Problem 3740
In Reply To:Re:what is the answer ..? Posted by:kengood at 2009-08-23 17:42:13 
> 
> 4 4
> 0 1 1 0   1 
> 1 0 0 0   2
> 0 0 1 1   3
> 0 0 0 1   4
> 
> 1 1 2 2   total
> 
> select 1 2 4
> 0 1 1 0   1 
> 1 0 0 0   2
> 0 0 0 1   4
> 
> 1 1 1 1    total
> 
> 
> Am I right?
就是选出一些行（不必连续）组成一个新矩阵，是新矩阵的每一列只有一个1
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