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;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.stream.Stream;

public class Main {
  public static void main(String[] args) throws Exception {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
    int n = Integer.parseInt(br.readLine());
    int ans = 0;
    if (n >= 400 && n <= 599) ans = 8;
    if (n >= 600 && n <= 799) ans = 7;
    if (n >= 800 && n <= 999) ans = 6;
    if (n >= 1000 && n <= 1199) ans = 5;
    if (n >= 1200 && n <= 1399) ans = 4;
    if (n >= 1400 && n <= 1599) ans = 3;
    if (n >= 1600 && n <= 1799) ans = 2;
    if (n >= 1800 && n <= 1999) ans = 1;

    out.println(ans);
    out.close();
  }
}