import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int T = Integer.parseInt(br.readLine().trim());

        for (int i = 0; i < T; i++) {
            StringTokenizer st = new StringTokenizer(br.readLine());

            long a = Long.parseLong(st.nextToken());
            long b = Long.parseLong(st.nextToken());
            long c = Long.parseLong(st.nextToken());
            long K = Long.parseLong(st.nextToken());

            for (long p = 0; p < K; p++) {
                long a2 = (b + c) / 2;
                long b2 = (c + a) / 2;
                long c2 = (a + b) / 2;

                if (a == a2 && b == b2 && c == c2) {
                    break;
                }

                a = a2;
                b = b2;
                c = c2;
            }

            System.out.println(a + b + c);
        }
    }
}