using System;

public class Program

{

    public static void Main()

    {

        var storedRunningCount = 0;

        // The calc = previous +- current; then => stored +- difference of previous/current

        // Math.Abs gives me the difference, it doesn't matter if it's positive or negative

        // if current number if higher than the previous it's a sum, else a subtraction

        var previousRunningCount = 3;

        var currentRunningCount = 3;

        var difference = previousRunningCount - currentRunningCount; // -2

        /*if (storedRunningCount >= 0)

            difference = Math.Abs(difference);*/

        Console.WriteLine(storedRunningCount - difference);

    }

    public static int NegativeNumbers()

    {

        var previousRunningCount = -5;

        var currentRunningCount = -3;

        var difference = previousRunningCount - currentRunningCount; // -2

        return difference;

    }

}