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
//クラス名は必ずMainにする必要があります。

import java.util.*;

public class Main {
  	public static void main(String args[] ) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		
		
		if(400 <=n && n < 600){
			System.out.println("8");
		}else if(600 <=n && n < 800){
			System.out.println("7");
		}else if(800 <=n && n < 1000){
			System.out.println("6");
		}else if(1000 <=n && n < 1200){
			System.out.println("5");
		}else if(1200 <=n && n < 1400){
			System.out.println("4");
		}else if(1400 <=n && n < 1600){
			System.out.println("3");
		}else if(1600 <=n && n < 1800){
			System.out.println("2");
		}else if(1800 <=n && n < 2000){
			System.out.println("1");
		}
		 
		
	}
	
}
