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`.

Examples

Input

725


Output

7


Input

1600


Output

2


import java.util.Map.Entry;
import java.util.*;
 
//import org.w3c.dom.css.Counter;
 
public class Main {
//public class App {
 
    public static void main(final String[] args){
     //スキャン
     final Scanner s = new Scanner(System.in);
     final int X = Integer.parseInt(s.next());
     //final int M = Integer.parseInt(s.next());
     int how = X /200;
     System.out.println(10 - how);

 

    
/*
     for(int i=0; i< K;i++){
        int di = Integer.pa rseInt(s.next());
        String blank = s.nextLine();
        String huge = s.nextLine();

        String[] hage = huge.split(" ",0);
        int hageN= hage.length;
        for (int num =0;num<hageN;num++){
            if(!hashSet.contains(hage[num])){
                hashSet.add(hage[num]);
            }
        }

     }
     s.close();

     System.out.println(N-hashSet.size());


}
*/
}
}