X = gets.to_i
case
  when 400 <= X && X <= 599
  puts 8
  when 600 <= X && X <= 799
  puts 7
  when 800 <= X && X <= 999
  puts 6
  when 1000 <= X && X <= 1199
  puts 5
  when 1200 <= X && X <= 1399
  puts 4
  when 1400 <= X && X <= 1599
  puts 3
  when 1600 <= X && X <= 1799
  puts 2
  when 1800 <= X && X <= 1999
  puts 1
end