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

long long a, b, c, K;

void solve() {
    scanf("%lld%lld%lld%lld", &a, &b, &c, &K);
    while (K--) {
        long long aa = (a + b) / 2;
        long long bb = (a + c) / 2;
        long long cc = (b + c) / 2;
        a = aa; b = bb; c = cc;
        if (a == b && b == c) break;
    }
    printf("%lld\n", a + b + c);
}

int main() {
    int tcase; scanf("%d", &tcase);
    while (tcase--) solve();
    return 0;
}