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.*;
import java.math.*;
import java.lang.*;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int x = sc.nextInt();

    if (400<= x && x<=599) {
      System.out.println(8);
    } else if (600<=x && x<=799) {
      System.out.println(7);
    } else if (800<=x && x<=999) {
      System.out.println(6);
    } else if (1000<=x && x<=1199) {
      System.out.println(5);
    } else if (1200<=x && x<=1399) {
      System.out.println(4);
    } else if (1400<=x && x<=1599) {
      System.out.println(3);
    } else if (1600<=x && x<=1799) {
      System.out.println(2);
    } else if (1800<=x && x<=1999) {
      System.out.println(1);
    }
  }

}
