using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        int[]input ={4, 6, 18, 90, 8, 17, 3, 65};

            int[] result = Reverse1(input);

            foreach(int a in result)

            {

                Console.WriteLine(a);

​

            }           

    }

    public static int[] Reverse1(int[] input)

        {

            int i = 0;

            int j = input.Length - 1;

            while (i < j)

            {

                if (input[i] < 10 && input[j] < 10)

                {

                    var temp = input[i];

                    input[i] = input[j];

                    input[j] = temp;

​

                    i++;

                    j--;

                }

                else if (input[i] < 10 && input[j] >= 10)

                {

                    j--;

                }

                else if (input[i] >= 10 && input[j] < 10)

                {

                    i++;

                }

                else

                {

                    i++;

                    j--;

                }

​

            }

            return input;

        }

​

}