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.*;
public class Main
{
  public static void main(String args[])
  {
    Scanner in=new Scanner(System.in);
    int  n=in.nextInt();
    if(n>=400 && n<=599)
    {
      System.out.println("8");
    }
    else if(n>=600 && n<=799)
    {
      System.out.println("7");
    }
    else if(n>=800 && n<=999)
    {
      System.out.println("6");
    }
    else if(n>=1000 && n<=1199)
    {
      System.out.println("5");
    }
    else if(n>=1200 && n<=1399)
    {
      System.out.println("4");
    }
    else if(n>=1400 && n<=1599)
    {
      System.out.println("3");
    }
    else if(n>=1600 && n<=1799)
    {
      System.out.println("2");
    }
    else if(n>=1800 && n<=1999)
    {
      System.out.println("1");
    }
  }
}
    