x=int(eval(input()))

l=[[600,8],[800,7],[1000,6],[1200,5],[1400,4],[1600,3],[1800,2],[2000,1]]



for m in l:

  if x<m[0]:

    print((m[1]))

    break
x=int(eval(input()))

for i in range(3,11):

  if x<i*200:

    print((11-i))

    break
x = int(eval(input()))
l = [
    [600, 8],
    [800, 7],
    [1000, 6],
    [1200, 5],
    [1400, 4],
    [1600, 3],
    [1800, 2],
    [2000, 1],
]
for m in l:
    if x < m[0]:
        print((m[1]))
        break

x = int(eval(input()))
for i in range(3, 11):
    if x < i * 200:
        print((11 - i))
        break

-l = [ -    [600, 8], -    [800, 7], -    [1000, 6], -    [1200, 5], -    [1400, 4], -    [1600, 3], -    [1800, 2], -    [2000, 1], -] -for m in l: -    if x < m[0]: -        print((m[1])) +for i in range(3, 11): +    if x < i * 200: +        print((11 - i))