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没看明白题目啊,例子3:55怎么算的啊?

Posted by myi_i at 2005-07-06 16:21:19 on Problem 2467
例子那条路最长也就20+5+15(14.1)~=40啊
最多时间40/20+40/50也到不了3小时啊。

老大们给提示一下吧,谢谢。

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