Tribonacci_Triangle

using System;

    class Program
    {
        static void Main(string[] args)
        {
            long num1 = long.Parse(Console.ReadLine());
            long num2 = long.Parse(Console.ReadLine());
            long num3 = long.Parse(Console.ReadLine());

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

            Console.WriteLine(num1);
            Console.Write("{0} ",num2);
            Console.Write(num3);
            Console.WriteLine();
            long aux = 0;
            int count = 3;
            while (count <= L) {

                for (int i = 0; i < count; i++)
                {
                    num1 = num1 + num2 + num3;
                    aux = num1;
                    num1 = num2;
                    num2 = num3;
                    num3 = aux;
                    Console.Write("{0} ", num3);

                }
                    Console.WriteLine();
                count++;




            }
        }
    }