N = gets.to_i

if N < 600 then
  puts 8
elsif N < 800 then
  puts 7
elsif N < 1000 then
  puts 6
elsif N < 1200 then
  puts 5
elsif N < 1400 then
  puts 4
elsif N < 1600 then
  puts 3
elsif N < 1800 then
  puts 2
else
  puts 1
end