using System;

public class Program

{

    public static void Main()

    {

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

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

        {

            if (mas[i] %2==0)

                mas[i] /= 2;

            else if(mas[i] %2!=0)

                mas[i] *= 2;

            Console.WriteLine(mas[i]);

        }

    }

}