using System;

public class Program

{

    public static void Main()

    {

        int n1, n2= 0, n3=0, n4=0;

        int count=0;

        Console.WriteLine("\tInput integer numbers: ");

        do

        {

            n1 = n2;

            n2 = n3;

            n3 = n4;

            n4 = int.Parse(Console.ReadLine());

            count++;

        }

        while((n1 + n2 + n3 != n4)||(count < 4));

            Console.WriteLine("The latest number is: {0} = {1}+{2}+{3}", n4, n1, n2 ,n3 );

        Console.Write("\n\n\t");

    }

}