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正向拓扑也是可以的,虽然速度慢了些

Posted by zfy0701 at 2008-09-17 21:44:43 on Problem 3687
In Reply To:试试这个吧,这两组数据比较能说明不可以正向拓扑的,只能反向建图。 Posted by:ImLazy at 2008-09-17 19:28:38
把字母造成的序添加到图中去并保证关系的传递性

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