03. Star Enigma

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Numerics;
using System.Text;

namespace Exam03
{
    class Program
    {
        static void Main(string[] args)
        {
            var numberOfTheIterations = int.Parse(Console.ReadLine());

            var attackedPlanets = new List<string>();
            var destroyedPlanets = new List<string>();

            for (int i = 0; i < numberOfTheIterations; i++)
            {
                var input = Console.ReadLine();

                var key = 0;

                var pattern = @"[starSTAR]";
                var keyRegex = new Regex(pattern);
                var matches = keyRegex.Matches(input);

                foreach (Match match in matches)
                {
                    key++;
                }

                var newText = "";

                foreach (var letter in input)
                {
                    var newletter = (char)(letter - key);
                    newText += string.Concat(newletter);
                }
                var nextPatter = @"[^@\-!:>]*@([A-Za-z]+)[^@\-!:>]*:([\d]+)[^@\-!:>]*!(A|D)![^@\-!:>]*->(\d+)";
                var decryptedRegex = new Regex(nextPatter);
                var matchh = decryptedRegex.Matches(newText);

                foreach (Match m in matchh)
                {
                    var groupe1 = m.Groups[1].Value;
                    var groupe3 = m.Groups[3].Value;

                    if (groupe3 == "A")
                    {
                        attackedPlanets.Add(groupe1);
                    }
                    else
                    {
                        destroyedPlanets.Add(groupe1);
                    }
                }
            }

            Console.WriteLine($"Attacked planets: {attackedPlanets.Count}");
            foreach (var planet in attackedPlanets.OrderBy(x => x))
            {
                Console.WriteLine($"-> {planet}");
            }

            Console.WriteLine($"Destroyed planets: {destroyedPlanets.Count}");
            foreach (var planet in destroyedPlanets.OrderBy(x => x))
            {
                Console.WriteLine($"-> {planet}");
            }
        }
    }
}