x = gets.to_i
k = 0
case x
when 400..599
  k = 8
when 600..799
  k = 7
when 800..999
  k = 6
when 1000..1199
  k = 5
when 1200..1399
  k = 4
when 1400..1599
  k = 3
when 1600..1799
  k = 2
when 1800..1999
  k = 1
end
puts k
