#include <bits/stdc++.h>

using i64 = long long;

void solve() {
    i64 a, b, c, K;
    std::cin >> a >> b >> c >> K;
    
    while ((a != b || b != c) && K > 0) {
        std::tie(a, b, c) = std::tuple((b + c) / 2, (a + c) / 2, (a + b) / 2);
        K--;
    }
    
    std::cout << a + b + c << "\n";
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int T;
    std::cin >> T;
    
    while (T--) {
        solve();
    }
    
    return 0;
}