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Re:用笨办法太慢了,高手能指点指点吗?

Posted by wangrx at 2008-11-13 18:52:44 on Problem 2853
In Reply To:Re:用笨办法太慢了,高手能指点指点吗? Posted by:chqch172443 at 2008-07-08 16:17:44
> 可不可以说说你是怎么推出来的啊??
因为如果n=m+(m+1)+...+(m+i-1)
那么减去数列(1+2+..+i)必定能够整除i,反之,如果减了后必定不能整除i,那么不能写成这个形式。

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