// 提出時にassertはオフ
#ifndef DEBUG
#ifndef NDEBUG
#define NDEBUG
#endif
#endif

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define ALL(x) (x).begin(), (x).end()
template <class T> using vec = vector<T>;

void query(ll &a, ll &b, ll &c){
    ll next_a = (b + c) / 2;
    ll next_b = (c + a) / 2;
    ll next_c = (a + b) / 2;
    a = next_a;
    b = next_b;
    c = next_c;
}

void solve(){
    ll a, b, c, K;
    cin >> a >> b >> c >> K;
    for(ll i = 0; i < K; i++){
        if(a == b && b == c) break;
        query(a, b, c);
    }
    cout << a + b + c << "\n";
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int T;
    cin >> T;
    for(int i = 0; i < T; i++){
        solve();
    }
}