x = gets.to_i

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