import sys
from collections import deque, Counter
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 63 - 1
mod = 998244353

def solve():
    a, b, c, k = mi()
    for _ in range(min(100, k)):
        a2 = (b + c) // 2
        b2 = (a + c) // 2
        c2 = (a + b) // 2
        a = a2
        b = b2
        c = c2
    print(a+b+c)

for _ in range(ii()):
    solve()