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Re:3740老是wa？是不是我理解题意有问题啊？请大牛进来指点下！

Posted by wskiwwwx at 2009-08-23 14:45:24 on Problem 3740
In Reply To:Re:3740老是wa？是不是我理解题意有问题啊？请大牛进来指点下！ Posted by:xingchen12 at 2009-08-23 14:40:11 
> 我的理解。。。
> 能找出一些行 使得这些行组成的matrix的每一列都有一个1 而且只能有一个1
> 4 4
> 0 1 0 0
> 1 0 1 0
> 0 0 0 0
> 1 0 1 0
> 这个第4列 全是0。。。应该是impossible吧。。。
> 
> 不过我也没过 一直WA。。。
你的理解是不是这个matrix的每一行，每一列全部都只能有一个1吗？
举个特殊点的例子，谢谢！
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