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Re:终于找到这道题的组合学公式,不过谁能给出证明过程?

Posted by lshguang89 at 2008-10-09 14:24:54 on Problem 2411
In Reply To:终于找到这道题的组合学公式,不过谁能给出证明过程? Posted by:badboy at 2007-05-20 01:55:23
精度不够怎么办?

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