Rage Quit - regex +linq - one Line :)

using System;
using System.Linq;
using System.Text.RegularExpressions;

namespace RageQuit
{
    class Program
    {
        static void Main(string[] args)
        {
            var collection = Regex.Matches(Console.ReadLine(), @"([^0-9]+)(\d*)");

            Console.WriteLine("Unique symbols used: {1}\n{0}", string.Join("", collection
               .Cast<Match>()
                .Select(m => string.Join("", (Enumerable.Repeat(m.Groups[1].ToString().ToUpper(), int.Parse(m.Groups[2].ToString())))))
                .ToList()), new string(string.Join("", collection.Cast<Match>().Where(y => y.Groups[2].ToString() != "0").Select(x => x.Groups[1].ToString().ToUpper()).ToArray()).Distinct().ToArray()).Count());
        }
    }
}