using System;

public class Program

{

    public static void Main()

    {

        //Массивы и циклы. Найти в массиве 5-ый, 3-ий и 8-ой элементы и умножить каждый на 2 (цикл for)

        int [] numbers = {5, 7, 2, 22, 11, 45, 33, 9, 8, 1};

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

            if (numbers [i] == numbers [4] | numbers [i] == numbers [2] | numbers [i] == numbers [7]) {

                numbers [i] = numbers [i] * 2;

                Console.WriteLine (numbers [i]);

            }

        }

    }

}