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.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

  public static void main(String[] args) throws Exception {
    try (final var stdin = new InputStreamReader(System.in);
         final var br = new BufferedReader(stdin)) {
      final var x = Integer.parseInt(br.readLine());
      if (x >= 400 && x <= 599) {
        System.out.println(8);
      } else if (x >= 600 && x <= 799) {
        System.out.println(7);
      }else if (x >= 800 && x <= 999) {
        System.out.println(6);
      }else if (x >= 1000 && x <= 1199) {
        System.out.println(5);
      }else if (x >= 1200 && x <= 1399) {
        System.out.println(4);
      }else if (x >= 1400 && x <= 1599) {
        System.out.println(3);
      }else if (x >= 1600 && x <= 1799) {
        System.out.println(2);
      }else if (x >= 1800 && x <= 1999) {
        System.out.println(1);
      }
    }
  }
}
