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;

class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int X = Integer.parseInt(sc.next());
		if(X >= 400 && X <= 599) {
			System.out.println(8);
		}else if(X <= 799) {
			System.out.println(7);
		}else if(X <= 999) {
			System.out.println(6);
		}else if(X <= 1199) {
			System.out.println(5);
		}else if(X <= 1399) {
			System.out.println(4);
		}else if(X <= 1599) {
			System.out.println(3);
		}else if(X <= 1799) {
			System.out.println(2);
		}else if(X <= 1999) {
			System.out.println(1);
		}
	}
}