#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;
using mint = modint998244353;

void solve() {
  ll a, b, c, K; cin >> a >> b >> c >> K;
  for (ll i = 0; i < K; i++) {
    ll A = (b + c) / 2;
    ll B = (c + a) / 2;
    ll C = (a + b) / 2;
    a = A, b = B, c = C;
    if (a == b && b == c && c == a) {
      break;
    }
  }
  cout << a + b + c << endl;
}

int main() {
  int T; cin >> T;
  while (T--) solve();
  return 0;
}