let kyu x =
  if 400 <= x && x <= 599 then 8
  else if 600 <= x && x <= 799 then 7
  else if 800 <= x && x <= 999 then 6
  else if 1000 <= x && x <= 1199 then 5
  else if 1200 <= x && x <= 1399 then 4
  else if 1400 <= x && x <= 1599 then 3
  else if 1600 <= x && x <= 1799 then 2
  else 1

let () = Printf.printf "%d\n" (kyu (read_int ()))