using System;

public class Program

{

    public static string output;

    public static int firstNumber;

    public static int secondNumber;

    public static string operators;

    public static int x;

    public static void Main()

    {

        x = 0;

        Console.Write("Input first number: ");

        GetValue();

        x++;

        Console.Write("Input second number: ");

        GetValue();

        Console.WriteLine("(A)ddition");

        Console.WriteLine("(S)ubtraction");

        Console.WriteLine("(M)ultiplication");

        Console.WriteLine("(D)ivision");

        Console.Write("Input operator: ");

        operators = Console.ReadLine();

        if (operators == "A"){

            output = "the sum of " + firstNumber + " and " + secondNumber + " is equal to " + Add(firstNumber, secondNumber);

        }

        else if (operators == "S"){

            output = "the difference of " + firstNumber + " and " + secondNumber + " is equal to " + Subtract(firstNumber, secondNumber);

        }

        else if (operators == "M"){

            output = "the product of " + firstNumber + " and " + secondNumber + " is equal to " + Multiply(firstNumber, secondNumber);

        }

        else if (operators == "D"){

            output = "the quotient of " + firstNumber + " and " + secondNumber + " is equal to " + Divide(firstNumber, secondNumber);

        }

        else{

            Console.WriteLine("UNIDENTIFIED OPERATOR FAM");

        }

        DisplayResult();

    }

    public static void GetValue() {

        if (x == 0){

            firstNumber = Convert.ToInt32(Console.ReadLine());

        }

        else{

            secondNumber = Convert.ToInt32(Console.ReadLine());

        }

    }

    public static int Add(int a, int b){

        int addition = a + b;

        return addition;

    }

    public static int Subtract(int a, int b){

        int subtraction = a - b;

        return subtraction;

    }

    public static int Multiply(int a, int b){

        int multiplication = a * b;

        return multiplication;

    }

    public static int Divide(int a, int b){

        int division = a / b;

        return division;

    }

    public static void DisplayResult(){

        Console.WriteLine(output);  

    }

}