using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

                int[] arrVes_REZ = new int[18] {

            950, 1024, 3, 850, 4000, 370, 250, 100, 2367, 477,

            100, 200, 500, 650, 123, 344, 54, 45

        };

​

        int[] Ves_V = new int[18];

        int[] N_V = new int[18];

        double avg = arrVes_REZ.Average();

        int i = 0;

        for (int key = 0; key < arrVes_REZ.Length; ++key)

        {

            if (arrVes_REZ[key] < avg) {

                Ves_V[i] = arrVes_REZ[key];

                N_V[i] = key;

                i++;

            }

        }

         for (int key = 0; key < i; ++key)

        {

           Console.WriteLine(Ves_V[key].ToString());

        }

        Console.WriteLine();

         for (int key = 0; key < i; ++key)

        {

           Console.WriteLine(N_V[key].ToString());

        }

    }

}