regex

namespace Regex
{
    using System;
    using System.Text.RegularExpressions;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            Regex regex = new Regex("([:|*]{2})(?<emoji>[A-Z][a-z]{2,})\\1");
            MatchCollection result = regex.Matches(input);
            List<string> coolEmoji = new List<string>();
            foreach (var emoji in result)
            {
                coolEmoji.Add(emoji.ToString());
            }
            Regex digit = new Regex("[0-9]");
            MatchCollection totoalDigit = digit.Matches(input);
            List<string> totalSum = new List<string>();
            foreach (var d in totoalDigit)
            {
                totalSum.Add(d.ToString());
            }

            long thresHoldSum = 1;
            for (int i = 0; i < totalSum.Count; i++)
            {
                long currDig = long.Parse(totalSum[i]);
                thresHoldSum *= currDig;
            }

            for (int i = 0; i < coolEmoji.Count; i++)
            {
                long emojiSum = 0;
                string currEmoji = coolEmoji[i];
                for (int u = 0; u < currEmoji.Length; u++)
                {
                    if (currEmoji[u] != '*' && currEmoji[u] != ':')
                    {
                        emojiSum += currEmoji[u];
                    }
                }
                if (emojiSum < thresHoldSum)
                {
                    coolEmoji.Remove(currEmoji);
                }
            }

            Console.WriteLine($"Cool threshold: {thresHoldSum}");

            if (coolEmoji.Count > 0)
            {
                Console.WriteLine($"{result.Count} emojis found in the text. The cool ones are:");
                foreach (var emoji in coolEmoji)
                {
                    Console.WriteLine($"{emoji}");
                }
            }
        }
    }
}