Problem:
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.

Solution in Ruby (2.7.1) (judge verdict: Accepted)

n=gets.to_i

if n>=400 && n<=599
    p 8
elsif n>=600 && n<=799
   p 7
   elsif n>=800 && n<=999
   p 6
   elsif n>=1000 && n<=1199
   p 5
   elsif n>=1200 && n<=1399
   p 4
   elsif n>=1400&& n<=1599
   p 3
   elsif n>=1600 && n<=1799
   p 2
   elsif n>=1800 && n<=1999
   p 1
end