Problem 13. Average Load Time Calculator

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

class AvrLoadTimeCalc
{
    static void Main(string[] args)
    {
        List<List<string>> matrix = new List<List<string>>();

        string line = " ";
        while (line != string.Empty)
        {
            line = Console.ReadLine();
            String[] values = line.Split(new Char[] { ' ' });
            matrix.Add(new List<String>(values));
        }

        List<string> webSites = new List<string>();

        for (int i = 0; i < matrix.Capacity - 1; i++)
        {
            webSites.Add(matrix[i][2]);
        }

        Console.WriteLine(new string('-', 30));

        webSites.Sort();
        List<string> printWebSite = new List<string>();

        double counter = 0;
        double time = 0;

        for (int i = 0; i < webSites.Capacity - 1; i++)
        {
            for (int j = 0; j < webSites.Capacity - 1; j++)
            {
                if (webSites[i] == webSites[j])
                {
                    time += double.Parse(matrix[i][3]);
                    counter++;
                }
            }
            if (!printWebSite.Contains(webSites[i]))
            {
                Console.WriteLine("{0} -> {1}", webSites[i], time / counter);
                counter = 0;
                time = 0;
                printWebSite.Add(webSites[i]);
            }
        }
    }
}