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.io.*;
public class Main{
	public static void main(String[] args) throws IOException{
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(reader.readLine());
		if(n>=400 && n<=599) System.out.println(8);	
		else if(n>599 && n<=799) System.out.println(7);
		else if(n>799 && n<=999) System.out.println(6);
		else if(n>999 && n<=1199) System.out.println(5);
		else if(n>1199 && n<=1399) System.out.println(4);
		else if(n>1399 && n<=1599) System.out.println(3);
		else if(n>1599 && n<=1799) System.out.println(2);
		else if(n>1799 && n<=1999) System.out.println(1);
	}
}
