T=int(input())

for t in range(T):
    a,b,c,K=map(int,input().split())
    for k in range(K):
        a,b,c=(b+c)//2,(c+a)//2,(a+b)//2
        if a==b==c:
            print(a+b+c)
            break

    print(a+b+c)