Common Board @ Timus Online Judge

I discover the formula for this prob. But how they come?(+)

Posted by TheBlaNK 7 Nov 2002 18:23

this is a part of my program

fscanf(fp,"%ld %lf %lf",&n,&a0,&an1);
res=(a0*n+an1)/(n+1);
for(i=0;i<n;i++)
{ fscanf(fp,"%lf",&tmp);
res-=(n-i)*tmp/(1+0.5*(n-1)); }
fprintf(fx,"%.2lf",res);

simple calculation 1047(-)

Posted by TheBlaNK 7 Nov 2002 19:14

> this is a part of my program
>
> fscanf(fp,"%ld %lf %lf",&n,&a0,&an1);
>   res=(a0*n+an1)/(n+1);
>   for(i=0;i<n;i++)
>    { fscanf(fp,"%lf",&tmp);
>      res-=(n-i)*tmp/(1+0.5*(n-1)); }
>   fprintf(fx,"%.2lf",res);

ЛЗСґґХ theblank

Posted by ss 8 Nov 2002 08:14

> > this is a part of my program
> >
> > fscanf(fp,"%ld %lf %lf",&n,&a0,&an1);
> >   res=(a0*n+an1)/(n+1);
> >   for(i=0;i<n;i++)
> >    { fscanf(fp,"%lf",&tmp);
> >      res-=(n-i)*tmp/(1+0.5*(n-1)); }
> >   fprintf(fx,"%.2lf",res);