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.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int x = Integer.parseInt(scanner.nextLine());
        int r = 0;
        if (400 <= x && x <= 599) r = 8;
        if (600 <= x && x <= 799) r = 7;
        if (800 <= x && x <= 999) r = 6;
        if (1000 <= x && x <= 1199) r = 5;
        if (1200 <= x && x <= 1399) r = 4;
        if (1400 <= x && x <= 1599) r = 3;
        if (1600 <= x && x <= 1799) r = 2;
        if (1800 <= x && x <= 1999) r = 1;
        System.out.println(r);
        scanner.close();
    }
}