fixedSolution

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

namespace TestExcercises
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] input;

            string command;

            long firstOperand;


            while (true)
            {
                input = Console.ReadLine().Split();

                command = input[0];
                if (command == "END")
                {
                    break;
                }

                firstOperand = long.Parse(input[1]);

                switch (command)
                {
                    case "INC":
                        {
                            Console.WriteLine(IncrementNumber(firstOperand));
                            break;
                        }
                    case "DEC":
                        {
                            Console.WriteLine(DecrementNumber(firstOperand));
                            break;
                        }
                    case "ADD":
                        {
                            long secondOperand = long.Parse(input[2]);
                            Console.WriteLine(AddNumbers(firstOperand, secondOperand));
                            break;
                        }
                    case "MLA":
                        {
                            long secondOperand = long.Parse(input[2]);
                            Console.WriteLine(MultiplycationNumbers(firstOperand, secondOperand));
                            break;
                        }
                    case "END":
                        {
                            break;
                        }
                }
            }

        }

        private static long IncrementNumber(long firstOperand)
        {
            long result = firstOperand + 1;
            return result;
        }

        private static long DecrementNumber(long firstOperand)
        {
            long result = firstOperand - 1;
            return result;
        }

        private static long MultiplycationNumbers(long firstOperand, long secondOperand)
        {
            long result = (long)firstOperand * (long)secondOperand;
            return result;
        }

        private static long AddNumbers(long firstOperand, long secondOperand)
        {
            long result = firstOperand + secondOperand;
            return result;
        }
    }
}