using System;

using System.Collections.Generic;

public class Program

{

    private static Dictionary<char, int> dist = new Dictionary<char, int> {

        { '0', 0 },

        { '1', 0 },

        { '2', 0 },

        { '3', 0 },

        { '4', 0 },

        { '5', 0 },

        { '6', 0 },

        { '7', 0 },

        { '8', 0 },

        { '9', 0 },

        { 'a', 0 },

        { 'b', 0 },

        { 'c', 0 },

        { 'd', 0 },

        { 'e', 0 },

        { 'f', 0 },

    };

    public static void Main()

    {

        Guid g;

        for (int i=0; i < 5000000; i++) {

            g = Guid.NewGuid();

            var c = g.ToString()[0];

            dist[c]++;

        }

        int v1 = 0, v2 = 0;

        foreach (var kvp in dist) {

            //Console.WriteLine(kvp.Key + "\t" + kvp.Value);

            if (kvp.Key <= '7')

                v1 += kvp.Value;

            else

                v2 += kvp.Value;

        }

        Console.WriteLine();

        Console.WriteLine("V1: " + v1);

        Console.WriteLine("V2: " + v2);

        Console.WriteLine("Variance: " + Math.Round((100.0 * Math.Abs(v2-v1)/v2), 3) + "%");

    }

}