using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

/*

​

    Given an array of numbers, replace each even number with two of the same number. e.g, [1,2,5,6,8] -> [1,2,2,5,6,6,8,8]. Assume that the array has enough space to accommodate the result.

​

*/