X = gets.to_i
case X
when 400..599
    puts 8
when 600..799
    puts 7
when 800..999
    puts 6
when 1000..1199
    puts 5
when 1200..1399
    puts 4
when 1400..1599
    puts 3
when 1600..1799
    puts 2
when 1800..1999
    puts 1
end