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) {
    	Scanner sc = new Scanner(System.in);
      	int X = sc.nextInt();
      	int M;
      	int m = 8;
      	if ((X>=400)&&(X<600)) {
          	M = m;
        } else if ((X>=600)&&(X<800)) {
          	M = m - 1;
        } else if ((X>=800)&&(X<1000)) {
          	M = m - 2;
        } else if ((X>=1000)&&(X<1200)) {
          	M = m - 3;
        } else if ((X>=1200)&&(X<1400)) {
          	M = m - 4;
        } else if ((X>=1400)&&(X<1600)) {
          	M = m - 5;
        } else if ((X>=1600)&&(X<1800)) {
          	M = m - 6;
        } else {M = m - 7;}
      
      	System.out.println(M);
	}
}