#include <bits/stdc++.h>
//#include <atcoder/all>
 
#define elif else if
#define ll long long
#define vll vector<long long>
#define vec vector
#define embk emplace_back
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep3(i, n, k) for (int i = k; i < (int)(n); i++)
#define all(a) a.begin(), a.end()
 
using namespace std;
//using namespace atcoder;
const ll INF = 1LL << 60;
const ll mod = 998244353;

void solve() {
  ll a, b, c, k; cin >> a >> b >> c >> k;
  
  k = min(10000LL, k);
  rep(i, k) {
    ll d = (b+c) / 2;
    ll e = (a+c) / 2;
    ll f = (a+b) / 2;
    
    if (d == e && e == f) {
      cout << d+e+f << endl;
      return;
    }
    else {
      a = d;
      b = e;
      c = f;
    }
  }
  
  cout << a+b+c << endl;
  return;
}

int main() {
  ll t; cin >> t;
  rep(i, t) solve();
  
}