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.*;
class Main
{
    public static void main(String [] args)
    {
        Map<String,Integer> map =new HashMap<>();
        Scanner  sc =new Scanner(System.in);
        map.put("400-599",8);
        map.put("600-799",7);
        map.put("800-999",6);
        map.put("1000-1199",5);
        map.put("1200-1399",4);
        map.put("1400-1599",3);
        map.put("1600-1799",2);
        map.put("1800-1999",1);
        int n = sc.nextInt();
        for(Map.Entry<String,Integer> map1:map.entrySet())
        {
            String str = map1.getKey();
            String chr[] = str.split("-");
            int start = Integer.parseInt(chr[0]);
            int end = Integer.parseInt(chr[1]);
            if(n>=start && n<=end)
            {
                System.out.println(map1.getValue());
                break;
            }
        }
    }
}