$0=K+1
$0=N/$0
$1=$0+1
$2=N/K
$2=$2+1
$3=K*N
$4=N*N
while$1<$2
  $5=$0+$2
  $5=$5/2
  $6=$3+$5
  $6=$5*$6
  if$6>$4
    $2=$5
  end
  if$6<=$4
    $0=$5
    $1=$5+1
  end
end
$0=$0+N
return$0