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 >= 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