some of my code:
{
  now:=sqr(x1[i]-x)+sqr(y1[i]-y)+sqr(z1[i]-z);
  if now-ans<zero then ans:=now;
}

If I make zero=-1e-6,WA.But if make zero=0 or zero=-1e-10 it got AC...

If it is about precision, why zero=0 OK?

Edited by author 04.03.2005 22:20