import sys
import os
import inspect
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)
inf = 10 ** 18

if os.getenv("TKTKLOCAL", False):
    def debug(*arg, sep=" ", end="\n"):
        print(*arg, sep=sep, end=end, file=sys.stderr)

    def debug_indent(*arg, sep=" ", end="\n", indent="    "):
        frame = inspect.currentframe().f_back
        par_func = inspect.getframeinfo(frame).function
        if par_func == "<module>":
            debug(*arg, sep=sep, end=end)
            return

        frame_stack = inspect.stack()
        if len(frame_stack) > 30:
            return

        depth = sum(f.function == par_func for f in frame_stack)
        debug(indent * (depth - 1), end="")
        debug(*arg, sep=sep, end=end)
else:
    def debug(*arg, **kwarg):
        pass

    def debug_indent(*arg, **kwarg):
        pass


def f(x, y):
    return (x + y) // 2


def solve():
    a, b, c, K = map(int, input().split())
    if a == b == c:
        print(3 * a)
        return

    for _ in range(K):
        na, nb, nc = f(b, c), f(a, c), f(a, b)
        if (a, b, c) == (na, nb, nc):
            break
        a, b, c = na, nb, nc
    print(a + b + c)


T = int(input())
for _ in range(T):
    solve()