Score: 100 points

Problem Statement

M-kun is a competitor in AtCoder, whose highest rating is X.
In this site, a competitor is given a kyu (class) according to his/her highest rating. For ratings from 400 through 1999, the following kyus are given:

  • From 400 through 599: 8-kyu
  • From 600 through 799: 7-kyu
  • From 800 through 999: 6-kyu
  • From 1000 through 1199: 5-kyu
  • From 1200 through 1399: 4-kyu
  • From 1400 through 1599: 3-kyu
  • From 1600 through 1799: 2-kyu
  • From 1800 through 1999: 1-kyu

What kyu does M-kun have?

Constraints

  • 400 \leq X \leq 1999
  • X is an integer.

Input

Input is given from Standard Input in the following format:

X

Output

Print the kyu M-kun has, as an integer. For example, if he has 8-kyu, print 8.


Sample Input 1

725

Sample Output 1

7

M-kun's highest rating is 725, which corresponds to 7-kyu.
Thus, 7 is the correct output.


Sample Input 2

1600

Sample Output 2

2

M-kun's highest rating is 1600, which corresponds to 2-kyu.
Thus, 2 is the correct output.