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.*;
public class Main {
    
    static void solve(){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();        
        if(n<600) System.out.println(8);
        else if((n>=600)&&(n<800)) System.out.println(7);
        else if((n>=800)&&(n<1000)) System.out.println(6);
        else if((n>=1000)&&(n<1200)) System.out.println(5);
        else if((n>=1200)&&(n<1400)) System.out.println(4);
        else if((n>=1400)&&(n<1600)) System.out.println(3);
        else if((n>=1600)&&(n<1800)) System.out.println(2);
        else if((n>=1800)&&(n<2000)) System.out.println(1);
        sc.close();
    }
    
    public static void main(String args[]) {
        solve();
    }
}