03. Star Enigma

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

namespace _03StarEnigma
{
    class Program
    {
        static void Main(string[] args)
        {
            int numOfMessages = int.Parse(Console.ReadLine());
            string pattern = @"([AaSsTtRr])";
            string pattern2 = @"@(?<planet>[A-Za-z]+)[^@\-\\!:>]*:(?<population>\d+)[^@\-\\!:>]*!(?<attack>[A-Z])!->(?<soldiers>\d+)";
            List<string> attackedPlanets = new List<string>();
            List<string> destroyedPlanets = new List<string>();
            for (int i = 1; i <= numOfMessages; i++)
            {
                string planetName = "";
                string population = "";
                string attackType = "";
                string soldiers = "";
                string message = Console.ReadLine();
                var matches = Regex.Matches(message, pattern);
                int counter = 0;
                foreach (Match symbol in matches)
                {
                    counter++;
                }
                string decryptedMessage = "";
                foreach (var symbol in message)
                {
                    char temp = (char)(symbol - counter);
                    decryptedMessage += temp;
                }
                counter = 0;
                var matches2 = Regex.Matches(decryptedMessage, pattern2);
                foreach (Match item in matches2)
                {
                     planetName = item.Groups["planet"].Value;
                     population = item.Groups["population"].Value;
                     attackType = item.Groups["attack"].Value;
                     soldiers = item.Groups["soldiers"].Value;
                }
                if (!string.IsNullOrEmpty(soldiers))
                {
                    if (attackType == "A")
                    {
                        attackedPlanets.Add(planetName);
                    }
                    else
                    {
                        destroyedPlanets.Add(planetName);
                    }
                }
            }
            attackedPlanets.Sort();
            destroyedPlanets.Sort();
            Console.WriteLine($"Attacked planets: {attackedPlanets.Count}");
            foreach (var item in attackedPlanets)
            {
                Console.WriteLine($"-> {item}");
            }
            Console.WriteLine($"Destroyed planets: {destroyedPlanets.Count}");
            foreach (var item in destroyedPlanets)
            {
                Console.WriteLine($"-> {item}");
            }
        }
    }
}