a = gets.to_i
if a < 600 then
  print(8)
elsif a < 800 then
  print(7)
elsif a < 1000 then
  print(6)
elsif a < 1200 then
  print(5)
elsif a < 1400 then
  print(4)
elsif a < 1600 then
  print(3)
elsif a < 1800 then
  print(2)
elsif a < 2000 then
  print(1)
end