07. Take/Skip Rope

namespace _07.Take_or_Skip_Rope
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    class Take_or_Skip_Rope
    {
        static void Main(string[] args)
        {
            string initialMessage = Console.ReadLine();
            char[] initialChars = initialMessage.
                ToCharArray();

            char[] letters = initialChars.
                Where(a => !char.IsDigit(a)).ToArray();

            int[] digits = initialChars.
                Where(a => char.IsDigit(a)).
                Select(a => int.Parse(a.ToString())).
                ToArray();

            List<int> take = new List<int>();
            List<int> skip = new List<int>();

            for (int i = 0; i < digits.Length; i++)
            {
                if (i % 2 == 0)
                {
                    take.Add(digits[i]);
                }

                else
                {
                    skip.Add(digits[i]);
                }
            }

            int totalSkip = 0;
            string finalMessage = String.Empty;

            for (int i = 0; i < take.Count; i++)
            {
                int takeCount = take[i];
                int skipCount = skip[i];

                finalMessage += new string(
                    letters.Skip(totalSkip).
                    Take(takeCount).ToArray());

                totalSkip += takeCount + skipCount;
            }

            Console.WriteLine(finalMessage);

        }
    }
}