#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
void solve() {
	long long a, b, c, K;
	cin >> a >> b >> c >> K;
	for( long long i = 1; i <= min(100LL, K); i++ ) {
		long long a_ = (b+c)>>1, b_ = (c+a)>>1, c_ = (a+b)>>1;
		a = a_, b = b_, c = c_;
	}
	cout << a+b+c << endl;
}
int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int T;
	cin >> T;
	while(T--) {
		solve();
	}
}