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.io.*;
class Main
{
  public static void main(String args[])throws IOException
  {
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    int x=Integer.parseInt(br.readLine());
    if(x>=400 && x<600)
      System.out.println("8");
    else if(x>=600 && x<800)
      System.out.println("7"); 
      else if(x>=800 && x<1000)
      System.out.println("6") ;
        else if(x>=1000 && x<1200)
      System.out.println("5");
      else if(x>=1200 && x<1400)
      System.out.println("4"); 
     else if(x>=1400 && x<1600)
      System.out.println("3"); 
      else if(x>=1600 && x<1800)
      System.out.println("2") ;
        else if(x>=1800 && x<2000)
      System.out.println("1");
  }
}