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Re:都是猛人，动动脚趾就ac了，sigh~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 Orz!原来是这样。。怪不得我写错也水过去了，原来问题是等价的=。= 另外同楼上，P(n,m)=C(n-1,m-1)应该不对吧 Followed by:
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