line = gets.to_i

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