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.Linq;
using System.Collections.Generic;

namespace MSPC2020
{
    class A
    {
        static void Main(string[] args)
        {
            //var CA = Enumerable.Repeat(0, (int)N).Select(_ => Console.ReadLine().Split().Select(long.Parse).ToArray()).ToArray();
            //var LRd = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var X = int.Parse(Console.ReadLine());
            //var a = Console.ReadLine().Split().Select(int.Parse).ToArray();

            if (400 <= X && X <= 599) Console.WriteLine("8");
            if (600 <= X && X <= 799) Console.WriteLine("7");
            if (800 <= X && X <= 999) Console.WriteLine("6");
            if (1000 <= X && X <= 1199) Console.WriteLine("5");
            if (1200 <= X && X <= 1399) Console.WriteLine("4");
            if (1400 <= X && X <= 1599) Console.WriteLine("3");
            if (1600 <= X && X <= 1799) Console.WriteLine("2");
            if (1800 <= X && X <= 1999) Console.WriteLine("1");

        }
    }
}