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又晕晕乎乎的1A....还在怀疑这样建图的正确性....

Posted by yuech at 2010-02-06 20:14:00 on Problem 2060 
我是这样做的：
i个旅程起点的时间-j个旅程的到达终点的时间-路上的时间>=1,那么i到j连一条边。。。
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