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