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不知道各位牛人是怎么做的，我用warshall做，优化了后还用了687ms

Posted by knuthocean at 2005-04-05 22:57:45 on Problem 2320

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我用的是直接O(N^6)（行列各O(N^3)）找圈，然后O(N^4)判断对圈的引用，貌似没有可优化的地方就0ms了 (0) frkstyc 2005-04-05 23:26:23

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