Problem:
Score: 100 points

Problem Statement

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.

Sample Input 1

725

Sample Output 1

7

M-kun's highest rating is 725, which corresponds to 7-kyu.

Thus, 7 is the correct output.

Sample Input 2

1600

Sample Output 2

2

M-kun's highest rating is 1600, which corresponds to 2-kyu.

Thus, 2 is the correct output.

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
public class Hello{
    public static void Main(){
        // Your code here!
        var line = Console.ReadLine();
        int X = int.Parse(line);
        int kyu = 0;
        if (400 <= X && X <= 599)
        {
            kyu = 8;
        }
        else if (600 <= X && X <= 799)
        {
            kyu = 7;
        }
        else if (800 <= X && X <= 999)
        {
            kyu = 6;
        }
        else if (1000 <= X && X <= 1199)
        {
            kyu = 5;
        }
        else if (1200 <= X && X <= 1399)
        {
            kyu = 4;
        }
        else if (1400 <= X && X <= 1599)
        {
            kyu = 3;
        }
        else if (1600 <= X && X <= 1799)
        {
            kyu = 2;
        }
        else if (1800 <= X && X <= 1999)
        {
            kyu = 1;
        }
        System.Console.WriteLine(kyu);
    }
}