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 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        String ans = "";
        if (400 <= N && N < 600) {
        	ans = "8";
        } else if (600 <= N && N < 800) {
        	ans = "7";
        } else if (800 <= N && N < 1000) {
        	ans = "6";
        } else if (1000 <= N && N < 1200) {
        	ans = "5";
        } else if (1200 <= N && N < 1400) {
        	ans = "4";
        } else if (1400 <= N && N < 1600) {
        	ans = "3";
        } else if (1600 <= N && N < 1800) {
        	ans = "2";
        } else if (1800 <= N && N < 2000) {
        	ans = "1";
        }
        System.out.println(ans); 
    }
}