my ($points, $quota) = @_;
my %compare = (
   18000 => 24,
   16000 => 23,
   14000 => 22,
    ... );
for my $key (sort {$b <=> $a} keys %compare)
{
  if ($points > $key and $quota < $compare{$key})
  {
    return $compare{key};
  }
}
return 15;