using System;

public class Rossella

{

    public static void Main()

    {

        Console.WriteLine("Insert number:");

        string input = Console.ReadLine();

        int number;

        Int32.TryParse(input, out number);

​

        double result;

​

        if (number==0){

            Console.WriteLine("Nothing to Calculate");

        }else if(number>0){

            result = Math.Pow(number, 3);

            Console.WriteLine(result);

        }else{

            result = Math.Abs(number);

            Console.WriteLine(result);

        }

    }

}