using System;

using System.Collections;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        List<int> results = new List<int>{2,3,4,5,7,8};

        Console.WriteLine(Result.minBias(results));

    }

​

}

public class Result {

    public static int minBias(List<int> ratings) {

        int result = 0;

        ratings.Sort();

        //ratings.ForEach(x => Console.WriteLine(x));

        int x = 0;

        while(x != ratings.Count) {

            result += ratings[x + 1] - ratings[x];

            Console.WriteLine(ratings[x + 1]);

            Console.WriteLine(ratings[x]);

            x += 2;

        }

        return result;

    }

}

​