a = io.read("*n")
b = 0
if a < 600 then
  b = 8
elseif a < 800 then
  b = 7
elseif a < 1000 then
  b = 6
elseif a < 1200 then
  b = 5
elseif a < 1400 then
  b = 4
elseif a < 1600 then
  b = 3
elseif a < 1800 then
  b = 2
else
  b = 1
end
print(b)
