Instruction-Set

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

namespace Instruction_Set
{
    class Program
    {
        static void Main()
        {
            long result = 0;
            List<long> saveResult = new List<long>();
            string opCode;
            do
            {
                opCode = Console.ReadLine();
                string[] codeArgs = opCode.Split(' ');

                switch (codeArgs[0])
                {
                    case "INC":
                        {
                            int operandOne = int.Parse(codeArgs[1]);
                            operandOne++;
                            result = operandOne;
                            saveResult.Add(result);
                            break;
                        }
                    case "DEC":
                        {
                            int operandOne = int.Parse(codeArgs[1]);
                            operandOne--;
                            result = operandOne;
                            saveResult.Add(result);
                            break;
                        }
                    case "ADD":
                        {
                            int operandOne = int.Parse(codeArgs[1]);
                            int operandTwo = int.Parse(codeArgs[2]);
                            result = operandOne + operandTwo;
                            saveResult.Add(result);
                            break;
                        }
                    case "MLA":
                        {
                            int operandOne = int.Parse(codeArgs[1]);
                            int operandTwo = int.Parse(codeArgs[2]);
                            result = (long)operandOne * (long)operandTwo;
                            saveResult.Add(result);
                            break;
                        }
                    default:
                        break;

                }
            } while (opCode != "END");
            foreach (var res in saveResult)
            {
                Console.WriteLine(res);
            }

        }
    }
}