using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var input = new []{1,1,4,4,2,2,2,4,3,10,1,3,3};

        int answer = 0;

        for (int i = 0; i < 64; i++) {

            int bitCount = 0;

            for (int j = 0; j < input.Count(); j++) {

                bitCount += input[j] & 1;

                input[j] = (input[j]) >> 1;

            }

            answer += (bitCount % 3) << i;

        }

        Console.WriteLine(answer);

    }

}