using System;

public class Program

{

    public static void Main()

    {

        int a = int.MaxValue;

        int b = 10;

        int x = int.MinValue;

        int y = 10;

        Console.WriteLine("Will overflow/wrap around and show wrong answers (incorrect sign):");

        Console.WriteLine("Add: " + Calculator.Add_wrong(a,b));

        Console.WriteLine("Subtract: " + Calculator.Subtract_wrong(x, y));

        Console.WriteLine("\nCorrect answers: ");

        Console.WriteLine("Add: " + Calculator.Add_right(a,b));

        Console.WriteLine("Subtract: " + Calculator.Subtract_right(x, y));

    }

}

​

static class Calculator

{

    public static long Add_wrong(int a, int b)

    {

        return a + b;

    }

​

    public static long Subtract_wrong(int a, int b)

    {

        return a - b;

    }

    public static long Add_right(int a, int b)

    {

        return a + (long)b;

    }

​

    public static long Subtract_right(int a, int b)

    {

        return a - (long)b;

    }

}