using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Please enter a whole number");

        int num1=int.Parse(Console.ReadLine());

        Console.Clear();

        Console.WriteLine("please enter a whole number");

        int num2=int.Parse(Console.ReadLine());

        Console.Clear();

        Console.WriteLine("please enter a whole number");

        int num3=int.Parse(Console.ReadLine());

        Console.Clear();

        int sum = Console.WriteLine( num1 + num2 + num3);

    }

}