x = gets.to_i

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