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){
      // 入力
      Scanner sc = new Scanner(System.in);
      int X = sc.nextInt();
      
      // 判定
      int kyu = 0;
      if(X <= 599){
        kyu = 8;
      }else if(X <= 799){
        kyu = 7;
      }else if(X <= 999){
        kyu = 6;
      }else if(X <= 1199){
        kyu = 5;
      }else if(X <= 1399){
        kyu = 4;
      }else if(X <= 1599){
        kyu = 3;
      }else if(X <= 1799){
        kyu = 2;
      }else if(X <= 1999){
        kyu = 1;
      }
      
      // 出力
      System.out.println(kyu);
    }

}