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Re:用生成函数推公式(组合数学)

Posted by lihaosky at 2009-05-20 19:33:03 on Problem 3734
In Reply To:用生成函数推公式(组合数学) Posted by:HoustonRockets at 2009-05-20 17:59:12
你太牛了,我使用排列组合加2次项推的

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