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