using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        double[] result = Tribonacci(new double[] { 1, 1, 1 }, 0);

        WriteOutTribonacci(result);

        double[] result2 = Tribonacci(new double[] { 0, 0, 1 }, 2);

        WriteOutTribonacci(result2);

        double[] result3 = Tribonacci(new double[] { 0, 1, 1 }, 10);

        WriteOutTribonacci(result3);

    }

​

    public static double[] Tribonacci(double[] signature, int n)

    {

        if (n == 0) return new double[0];

​

        double[] tribonacci = new double[n];

        Array.Copy(signature, tribonacci, 3 > n ? n : 3);

        for (int i = 3; i < n; i++)

        {

            tribonacci[i] = tribonacci[i - 1] + tribonacci[i - 2] + tribonacci[i - 3];

        }

​

        return tribonacci;

    }

​

    public static void WriteOutTribonacci(double[] result)

    {

        Console.Write('[');

        foreach (double number in result)

        {

            Console.Write(" {0}, ", number);

        }

​

        Console.Write(']');

    }

}