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 stdIn = new Scanner(System.in);
     
     int x = stdIn.nextInt();
     
       if (x >= 400 && x <= 599){System.out.print("8"); }
       else if (x >= 600 && x <= 799) {System.out.print("7");}
       else if (x >= 800 && x <= 999) {System.out.print("6");}
       else if (x >= 1000 && x <= 1199) {System.out.print("5");}
       else if (x >= 1200 && x <= 1399) {System.out.print("4");}
       else if (x >= 1400 && x <= 1599) {System.out.print("3");}
       else if (x >= 1600 && x <= 1799) {System.out.print("2");}
       else if (x >= 1800 && x <= 1999) {System.out.print("1");}
                                
   }
 }