#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define drep(i, cc, n) for (int i = (cc); i <= (n); ++i)
#define rep(i, n) drep(i, 0, n - 1)
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define fi first
#define se second

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    
    ll t; cin >> t;
    while(t--){
        ll a, b, c, k; cin >> a >> b >> c >> k;
        while(k--){
            if(a == b && b == c && c == a) break;
            ll pre_a = a, pre_b = b, pre_c = c;
            a = (pre_b+pre_c)/2;
            b = (pre_c+pre_a)/2;
            c = (pre_a+pre_b)/2;
        }

        cout << a+b+c << '\n';
    }
}