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请教

Posted by haolujun at 2009-04-16 18:47:37 on Problem 2134
这题有以下几点不明
1)按照题意,每次只能把速度加1或减1,数据能保证最后一定有解吗
2)如果肯定保证有解,这里面的Tc是干什么用的
3)Tc (the integer amount of time since the light last changed),我理解的意思是某个路口的等在Tc时间后就不再变了
那么题目所给的数据是不可能有解的,因为从0时刻之后等都是红色
小弟愚笨 请高手解答

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