let x = read_int ()
let _ = (
  if x < 600 then "8" else
  if x < 800 then "7" else
  if x < 1000 then "6" else
  if x < 1200 then "5" else
  if x < 1400 then "4" else
  if x < 1600 then "3" else
  if x < 1800 then "2" else
  "1"
) |> print_endline