/* -*- coding: utf-8 -*-
 *
 * 2233.cc:  No.2233 Average - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    ll a, b, c, k;
    scanf("%lld%lld%lld%lld", &a, &b, &c, &k);

    while (k > 0 && ! (a == b && b == c)) {
      ll a1 = (b + c) / 2, b1 = (c + a) / 2, c1 = (a + b) / 2;
      a = a1, b = b1, c = c1;
      k--;
    }

    printf("%lld\n", a + b + c);
  }
  return 0;
}