#include <bits/stdc++.h>

using namespace std;

void solve(){
    long long a, b, c, k;
    cin >> a >> b >> c >> k;
    long long ta, tb, tc;
    k=min(k,80ll);
    while(k > 0){
        ta = (b+c)/2;
        tb = (a+c)/2;
        tc = (b+a)/2;
        a = ta, b = tb, c = tc;
        if(a == b && b == c){
            break;
        }
        k--;
    }
    cout << (a+b+c) << "\n";

}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t;
    cin >> t;
    while(t--){
       solve();     
    }

    return 0;
}