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.io.*;
import java.util.*;

public class Main {
    public static void main(String args[]) throws Exception {
        BufferedReader bu = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();
        int n = Integer.parseInt(bu.readLine());
        if(n>= 400 && n <= 599)
            sb.append(8);
        else if (n>=600 && n <= 799)
            sb.append(7);
        else if (n>=800 && n<=999)
            sb.append(6);
        else if (n>=1000 && n <= 1199)
            sb.append(5);
        else if (n>=1200 && n<= 1399)
            sb.append(4);
        else if (n>=1400 && n<=1599)
            sb.append(3);
        else if (n>=1600 && n<= 1799)
            sb.append(2);
        else
            sb.append(1);
        System.out.print(sb);
    }
}
