using System;

public class Program

{

    public static void Fill(int[] arr, int from, int to, int val)

        {

            if (from > to)

                return;

​

            if (from < 0 || from >= arr.Length)

                return;

​

            if (to < 0 || to >= arr.Length)

                return;

​

            for (int i = from; i <= to; i++)

            {

                arr[i] = val;

            }

        }

​

        public static void PrintArray(int[] arr)

        {           

            for (int i = 0; i < arr.Length; i++)

            {

                Console.Write("{0},",arr[i]);

            }

            Console.WriteLine();

        }

​

    public static Q1()

    {

        int[] arr = new int[]{ 5,17,8,29,103,89, 46, 503,22 };

        PrintArray(arr);

        Fill(arr,5,0,999);

        PrintArray(arr);

    }

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Q1();       

    }

}