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终于过了,貌似没有trick

Posted by checkoj at 2010-11-08 22:35:54 on Problem 1136
In Reply To:一看求周期,刷刷把时间积分出来了=ln(tg(x/4)),然后一看是求路程,情何以堪 Posted by:checkoj at 2010-11-08 19:58:05
RT

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