n = gets.chomp.to_i

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