#include <bits/stdc++.h>
using namespace std;
#define pb push_back
using ll = long long;
using vi = vector <int>;
const ll mod = 1e9 + 7;


int main() {
	ios::sync_with_stdio(0);
	
	int T; cin >> T;
	while(T --) {
		ll a, b, c, k;
		cin >> a >> b >> c >> k;
		for(ll i = 0; i < k; i ++) {
			if(a == b && a == c)
				break;
			
			ll A = (b + c) / 2;
			ll B = (c + a) / 2;
			ll C = (a + b) / 2;
			a = A;
			b = B;
			c = C;
		}
		
		cout << a + b + c << '\n';
	}
}