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

