List Manipulation Advanced

using System;
using System.Linq;
using System.Collections.Generic;

public class Program
{
	public static void Main()
	{
		List<long>numbers = Console.ReadLine().Split().Select(long.Parse).ToList();

		int counter=0;

		while (true)
		{
			string command = Console.ReadLine();

			if (command=="end")
			{
				break;
			}

			string[] token = command.Split();

			string line = token[0];

			if (line=="Add")
			{
				int number = int.Parse(token[1]);

				numbers.Add(number);
				counter++;
			}
			else if (line == "Remove")
			{
				int number = int.Parse(token[1]);

				numbers.Remove(number);
				counter++;
			}
			else if (line=="RemoveAt")
			{
				int index = int.Parse(token[1]);

				numbers.RemoveAt(index);
				counter++;
			}
			else if (line=="Insert")
			{
				int number = int.Parse(token[1]);
				int index = int.Parse(token[2]);

				numbers.Insert(index,number);
				counter++;
			}
			else if (line=="Contains")
			{
				long number = long.Parse(token[1]);

				bool contain = numbers.Contains(number);

				if (contain==true)
				{
					Console.WriteLine("Yes");
				}
				else
				{
					Console.WriteLine("No such number");
				}
			}
			else if (line=="PrintEven")
			{
				List<long>evenNums = new List<long>();

				for (int i=0; i<numbers.Count; i++)
				{
					if (numbers[i]%2==0)
					{
						evenNums.Add(numbers[i]);
					}
				}
				Console.WriteLine(string.Join(" ",evenNums));
				evenNums.Clear();
			}
			else if (line=="PrintOdd")
			{
				List<long>oddNums = new List<long>();

				for (int i=0; i<numbers.Count; i++)
				{
					if (numbers[i]%2==1)
					{
						oddNums.Add(numbers[i]);
					}
				}
				Console.WriteLine(string.Join(" ",oddNums));
				oddNums.Clear();
			}
			else if (line=="GetSum")
			{
				long sum = numbers.Sum();
				Console.WriteLine(sum);
			}
			else if (line=="Filter")
			{
				string condition = token[1];
				long number = long.Parse(token[2]);

				if (condition == "<")
				{
					List <long> less = new List<long>();

					for (int i=0; i<numbers.Count; i++)
					{
						if (numbers[i] < number)
						{
							less.Add(numbers[i]);
						}
					}
					Console.WriteLine(string.Join(" ",less));
					less.Clear();
				}
				else if (condition == ">")
				{
					List <long> more = new List<long>();

					for (int i=0; i<numbers.Count; i++)
					{
						if (numbers[i] > number)
						{
							more.Add(numbers[i]);
						}
					}
					Console.WriteLine(string.Join(" ",more));
					more.Clear();
				}
				else if (condition == ">=")
				{
					List <long> moreAndEqual = new List<long>();

					for (int i=0; i<numbers.Count; i++)
					{
						if (numbers[i] >= number)
						{
							moreAndEqual.Add(numbers[i]);
						}
					}
					Console.WriteLine(string.Join(" ",moreAndEqual));
					moreAndEqual.Clear();
				}
				else if (condition == "<=")
				{
					List <long> lessAndEqual = new List<long>();

					for (int i=0; i<numbers.Count; i++)
					{
						if (numbers[i] <= number)
						{
							lessAndEqual.Add(numbers[i]);
						}
					}
					Console.WriteLine(string.Join(" ",lessAndEqual));
					lessAndEqual.Clear();
				}
			}
	   }

	   if (counter>0)
	   {

		  Console.WriteLine(string.Join(" ",numbers));
	   }

	}
}