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注意这句话。。。

Posted by xxiioo3 at 2011-08-06 17:41:39 on Problem 2134
The car may move when the light changes from red to green, but not when it changes from green to red

恶心了我一下午。。。弄不明白 他是把时间看成点 还是看成线段

现在过了 给大家说下 样例中 按照tr=tg=10 0-9时刻 应该是红灯 10-19应该是绿灯 确切的说 是 0-9.999999是红灯

但是 考虑那句话 就是0-9.0是红灯 9.000001-19.0是绿灯。。。 就是这样。。。

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