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CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
					
public class Program
{
	 static List<string> ListOfPositive = new List<string>();
        static List<string> ListOfNegative = new List<string>();
        static bool InitialPositiveCheck = false;
       public static void Main(string[] args)
        {
            string InputStr = "DIM H + QUT OF PIP DIM - DIM L + XYZ - ABC";
            AddToLIst(InputStr);
            ListOfPositive.Reverse();
            ListOfNegative.Reverse();
            Console.WriteLine(string.Join("", ListOfPositive));
            Console.WriteLine(string.Join("", ListOfNegative));         
        }

        static void AddToLIst(string newstring)
        {
            if (!(newstring.Trim().StartsWith("+")) && !InitialPositiveCheck)
            {
                newstring = "+ " + newstring;
                InitialPositiveCheck = true;
            }

            int indexOfPlus = newstring.LastIndexOf("+");
            int indexOfMinus = newstring.LastIndexOf("-");

            string str = "";
            if (indexOfMinus == -1 && indexOfPlus == -1)
                return;

            if (indexOfPlus < indexOfMinus)
            {
                str = newstring.Substring(indexOfMinus + 1);
                ListOfNegative.Add(str);
                str = newstring.Remove(indexOfMinus);
                AddToLIst(str);
            }
            else
            {
                str = newstring.Substring(indexOfPlus + 1);
                ListOfPositive.Add(str);
                str = newstring.Remove(indexOfPlus);
                AddToLIst(str);
            }
        }

}