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Re:公式的推导

Posted by codingman at 2011-10-04 13:32:58 on Problem 2140
In Reply To:公式的推导 Posted by:Ly86 at 2010-04-25 19:03:36
牛人,我第一看到用数学来解题,而不是直接敲代码。这才是acm的魅力。

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