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Re:都是猛人,动动脚趾就ac了,sigh~

Posted by ip96cns at 2010-12-07 19:35:43 on Problem 1283
In Reply To:都是猛人,动动脚趾就ac了,sigh~ Posted by:tzkq at 2010-07-13 05:33:35
P(n,m)=C(n-1,m-1)
这个是不正确的.

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