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;
class Program
{

    static void Main()
    {
        string[] X = Console.ReadLine().Split(' ');
        int x = int.Parse(X[0]);
        

        if (x<=599)
        {
            Console.WriteLine("8");
        }
        else if(x>=600&&x<=799)
        {
            Console.WriteLine("7");
        }
        else if (x >= 800 && x <= 999)
        {
            Console.WriteLine("6");
        }
        else if (x >= 1000 && x <= 1199)
        {
            Console.WriteLine("5");
        }
        else if (x >= 1200 && x <= 1399)
        {
            Console.WriteLine("4");
        }
        else if (x >= 1400 && x <= 1599)
        {
            Console.WriteLine("3");
        }
        else if (x >= 1600 && x <= 1799)
        {
            Console.WriteLine("2");
        }
        else if (x >= 1800 && x <= 1999)
        {
            Console.WriteLine("1");
        }

    }

}