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.Diagnostics;
using System.IO;
using System.Linq;

namespace MyProject
{
    class Program
    {
        static void Main(string[] args)
        {
#if Local
            var sw = new Stopwatch();
            sw.Start();
            Console.SetIn(new StreamReader("input.in"));
#endif

            var solver = new Solver();
            solver.Solve();
#if Local
            Console.WriteLine($"{sw.ElapsedMilliseconds}ms");
#endif
        }
    }

    class Solver
    {
        public void Solve()
        {
            var table = new List<Tuple<int, int, int>>()
            {
                { new Tuple<int, int, int>(400, 599, 8) },
                { new Tuple<int, int, int>(600, 799, 7) },
                { new Tuple<int, int, int>(800, 999, 6) },
                { new Tuple<int, int, int>(1000, 1199, 5) },
                { new Tuple<int, int, int>(1200, 1399, 4) },
                { new Tuple<int, int, int>(1400, 1599, 3) },
                { new Tuple<int, int, int>(1600, 1799, 2) },
                { new Tuple<int, int, int>(1800, 1999, 1) },
            };

            var X = int.Parse(Console.ReadLine());
            int kyu = table.First(elem => elem.Item1 <= X && X <= elem.Item2).Item3;
            Console.WriteLine(kyu);
        }
    }
}