Litle John

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace LittleJohn
{
    public class StartUp
    {
        public static void Main(string[] args)
        {
            const string pattern = @"(>----->)|(>>----->)|(>>>----->>)";
            var regex = new Regex(pattern);
            var smallOnes = 0;
            var mediumOnes = 0;
            var longOnes = 0;

            for (var i = 0; i < 4; i++)
            {
                var match = regex.Match(Console.ReadLine());
                while (match.Success)
                {
                    if (!match.Groups[1].Value.Equals(""))
                    {
                        smallOnes++;
                    }
                    else if (!match.Groups[2].Value.Equals(""))
                    {
                        mediumOnes++;
                    }
                    else if (!match.Groups[3].Value.Equals(""))
                    {
                        longOnes++;
                    }
                    match = match.NextMatch();
                }
            }
            var decimalOutput = smallOnes.ToString() + mediumOnes + longOnes;
            var binary = Convert.ToString(int.Parse(decimalOutput), 2);
            binary = binary + string.Join("", binary.Reverse());
            var encrypted = Convert.ToInt32(binary, 2);
            Console.WriteLine(encrypted);
        }
    }
}