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Re:超水！！ 0MS就ok 代码共享

Posted by 348854308 at 2010-02-19 21:09:41 on Problem 2853
In Reply To:超水！！ 0MS就ok 代码共享 Posted by:z1160y at 2009-05-23 01:52:54 
本人菜鸟 我的方法没这个好 太慢 可是不太明白  a1=(2.0*x/n-n+1)/2;  这个怎么解释呢？  希望得到大家指点啊。
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