using System;

​

public class Program

{

    public static void Main()

    {

        int[] a = {7, 3, 6, 5, 2, 4};

        int sum = 11;

        Array.Sort(a, 0, a.Length);

        var i = 0;

        var j = a.Length - 1;

        while (i < j)

        {

            Console.WriteLine(a[0]);

            Console.WriteLine(a[1]);

            Console.WriteLine(a[2]);

            Console.WriteLine(a[3]);

            Console.WriteLine(a[4]);

            Console.WriteLine(a[5]);

        /*if (a[i] + a[j] == sum)

            {

                Console.WriteLine(a[i]);

            }

            else if (a[i] + a[j] < sum)

            {

                i++;

            }

            else

            {

                j--;

            }*/

        }

    }

}