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;
using System.Collections.Generic;
using System.Linq;

public class Hello
{
    public static void Main()
    {
        hoge();
        System.Console.ReadLine();
    }

    public static void hoge()
    {
        var vars = System.Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        var x = vars[0];

        var rank = 0;

        if(x <= 599)
        {
            rank = 8;
        }
        else if (x <= 799)
        {
            rank = 7;
        }
        else if (x <= 999)
        {
            rank = 6;
        }
        else if (x <= 1199)
        {
            rank = 5;
        }
        else if (x <= 1399)
        {
            rank = 4;
        }
        else if (x <= 1599)
        {
            rank = 3;
        }
        else if (x <= 1799)
        {
            rank =2 ;
        }
        else if (x <= 1999)
        {
            rank = 1;
        }
        Console.WriteLine(rank);
    }
}