Discussion @ 1092. Transversal @ Timus Online Judge

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Discussion of Problem 1092. Transversal

I used Greedy and got AC.But I found that my algorithm isn't right for all case and the tests seem to be always have a solution.

Posted by Yu YuanMing 30 Jun 2004 20:31

Is there somebody has a correct idea?
Please write it down.
Thanks!

I think greedy is OK. Post here the tests it fails (-)