$1=1
$2=1
$3=K
$4=1
$5=K+1
$7=N
while$6<$7
  $8=$4*$4
  $8=$8/$5
  $9=$4*K
  $8=$8+$9
  if$8>=$5
    $2=$4
    $3=$5
  end
  if$8<$5
    $0=$4
    $1=$5
  end
  $4=$0+$2
  $5=$1+$3
  $6=$0*N
  $7=$2*N
  $6=$6/$1
  $7=$7/$3
end
$0=$6+N
return$0