Change Even Bits

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication2
{
    class Program
    {

        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int number = 0;
            int changed = 0;
            List<int> counter = new List<int>();
            for (int i = 0; i < n; i++)
            {
                number = int.Parse(Console.ReadLine());
                string binary = Convert.ToString(number, 2);
                int positions = binary.Length;
                counter.Add(positions);
            }
            int l = int.Parse(Console.ReadLine());
            foreach (var item in counter)
            {
                for (int j = 0; j <= 2 * item - 2; j += 2)
            {
                int mask = 1 << j;

                int bitValue = (l & mask) >> j;
                if (bitValue == 0)
               {
                    int maskForConversion = (1 << j);
                    l = l | maskForConversion;
                    changed++;
                }

            }

            }
            Console.WriteLine(l);
            Console.WriteLine(changed);

        }
    }
}