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Re:公式的推导

Posted by Ly86 at 2010-04-25 19:05:40 on Problem 2140
In Reply To:公式的推导 Posted by:Ly86 at 2010-04-25 19:03:36
顺便说一下
数据太弱了
直接循环就可以过了
不用因数分解

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