using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new long[t];
        for (var u = 0; u < t; ++u)
        {
            var p = NList;
            var (a, b, c) = (p[0], p[1], p[2]);
            for (var i = 0; i < p[3]; ++i)
            {
                if (a == b && b == c) break;
                (a, b, c) = ((b + c) / 2, (c + a) / 2, (a + b) / 2);
            }
            ans[u] = a + b + c;
        }
        WriteLine(string.Join("\n", ans));
    }
}