#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int t;
    cin >> t;
    for (; t--;) {
        long long a, b, c, k;
        cin >> a >> b >> c >> k;
        while (k > 0 && a != b) {
            long long na = (a + b) / 2;
            long long nb = (b + c) / 2;
            long long nc = (c + a) / 2;
            a = na;
            b = nb;
            c = nc;
            k--;
        }
        cout << a + b + c << '\n';
    }
}