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Re:TLE help;In Reply To:Re:TLE help; Posted by:beiyouyu at 2007-07-09 13:16:58 > for(i=0;i<n;i++)
> {
> for(j=i+1;j<n;j++)
> {
> sum=sum+((x[i]-x[j])+(y[i]-y[j])+(z[i]-z[j]))/2;
> }
> }
>
>
> 那这个降为O(n)
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