x = gets.to_i

switch 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