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.Scanner;
class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);

    int x = sc.nextInt();
    int k = 0;
    if(400 <= x && x < 600) k = 8;
    else if(600 <= x && x < 800) k = 7;
    else if(800 <= x && x < 1000) k = 6;
    else if(1000 <= x && x < 1200) k = 5;
    else if(1200 <= x && x < 1400) k = 4;
    else if(1400 <= x && x < 1600) k = 3;
    else if(1600 <= x && x < 1800) k = 2;
    else if(1800 <= x && x <= 1999) k = 1;
    System.out.println(k);
  }
}