rate = gets().chomp().to_i
if rate >= 400 && rate <= 599
  p 8
elsif rate >= 600 && rate <= 799
  p 7
elsif rate >= 800 && rate <= 999
  p 6
elsif rate >= 1000 && rate <= 1199
  p 5
elsif rate >= 1200 && rate <= 1399
  p 4
elsif rate >= 1400 && rate <= 1599
  p 3
elsif rate >= 1600 && rate <= 1799
  p 2
elsif rate >= 1800 && rate <= 1999
  p 1
end