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 Pascal (FPC 3.0.4) (judge verdict: Wrong Answer)

program bt;

var x,a:integer;

begin
   readln(x);
   a := 0;
   if (x>=400) and (x<=599) then a:=8 else
   if (x>=600) and (x<=799) then a:=7 else
   if (x>=800) and (x<=999) then a:=6 else
   if (x>=1000) and (x<=1199) then a:=5 else
   if (x>=1200) and (x<=1399) then a:=4 else
   if (x>=1400) and (x<=1399) then a:=3 else
   if (x>=1600) and (x<=1799) then a:=2 else
   if (x>=1800) and (x<=1999) then a:=1;
   if (a>0) then write(a);
   readln;
end.