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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int t;
    cin >> t;
    while(t--) {
        long long a,b,c,K;
        cin >> a >> b >> c >> K;
        while(K--) {
            long long A = (b+c)/2,B = (a+c)/2,C = (a+b)/2;
            a = A,b = B,c = C;
            if(a == b && b == c) break;
        }
        cout << a+b+c << "\n";
    }
}