BoomingCannon - RegEX

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

namespace _03_boomingCount
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int n = numbers[0];
            int m = numbers[1];

            string input = Console.ReadLine();
            int remove = input.IndexOf("\\<<<");
            if(remove == -1)
            {

            }
            else
            {
                string[] field = input
                .Substring(remove)
                .Split(new string[] { "\\<<<" }, StringSplitOptions.RemoveEmptyEntries)
                .ToArray();
                List<string> destroyed = new List<string>();

                foreach (var canon in field)
                {
                    if (n <= canon.Length - 1)
                    {
                        int length = n + m;
                        if (length > canon.Length)
                        {
                            string currDestroyed = canon.Substring(n, canon.Length - n);
                            destroyed.Add(currDestroyed);
                        }
                        else
                        {
                            string currDestroyed = canon.Substring(n, m);
                            destroyed.Add(currDestroyed);
                        }
                    }
                }

                Console.WriteLine(string.Join("/\\", destroyed));
            }

        }
    }
}