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我是神牛杜宇飞

Posted by godoxduyufei at 2010-09-21 18:03:24 on Problem 3921
In Reply To:Re:谁能给思路 啊 Posted by:batmancn at 2010-08-25 16:28:24 
> 貌似是求图的最小点覆盖集
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