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