x = gets.to_i

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