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显然不是！

Posted by frkstyc at 2005-08-01 20:57:25 on Problem 2515
In Reply To:Bernoulli数是不是就是组合数阿 Posted by:vk at 2005-08-01 20:50:25 
> 我靠，看明白了，公式是一样的！
> 我也是先求了组合数，还是慢阿~~
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