#include <bits/stdc++.h>

using namespace std;

void solve() {
    long long a, b, c, k;
    cin >> a >> b >> c >> k;
    while (k--) {
        long long na = (a + b) / 2, nb = (b + c) / 2, nc = (c + a) / 2;
        a = na, b = nb, c = nc;
        if (a == b && b == c) {
            break;
        }
    }
    cout << a + b + c << endl;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int t;
    cin >> t;
    while (t--) {
        solve();
    }
}