$0 = 0
$2 = 0
$100 = 0
while($0 < H * W)
  $3 = ($0 / W) + 1
  $4 = ($0 % W) + 1
  $5 = A[$3, $4]
  $6 = B[$3, $4]
  $7 = ($5 - $6) * ($5 - $6)
  $7 = ($7 + 10000) / 100001
  $2 = $2 + $7 * $0
  $0 = $0 + 1
end
return($2 / W + 1, $2 % W + 1)