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.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.Set;

public class Main{

	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);

		int n      = Integer.parseInt(scanner.nextLine()) - 400;
		int ans    = 8;
		boolean flg = true;
		while(flg) {

			if(n >= 200) {

				n -= 200;
				ans--;
			}else {
				flg = false;
			}
		}

		System.out.println(ans);


		/*
		 * 400以上599以下：8級
		 * 600以上799以下：7級
		 * 800以上999以下：6級
		 * 1000以上1199以下：5級
		 * 1200以上1399以下：4級
		 * 1400以上1599以下：3級1600以上1799以下：2級1800以上1999以下：1級
		 */


	}

}
