X = ARGF.gets.chomp.to_i

ans = 
  if X <= 599
    8
  elsif X <= 799
    7
  elsif X <= 999
    6
  elsif X <= 1199
    5
  elsif X <= 1399
    4
  elsif X <= 1599
    3
  elsif X <= 1799
    2
  else
    1
  end

puts ans


