#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
ld pie=3.14159265359;
ll inf=10000000000000001;
ll mod=998244353;
int main(){
	ll t;
	cin >> t;
	for (ll o = 0; o < t; o++)
	{
		ll a,b,c,k;
		cin >> a >> b >> c >> k;
		for (ll i = 0; i < k; i++)
		{
			if (a==b&&b==c)
			{
				break;
			}
			ll aa=(b+c)/2,bb=(a+c)/2,cc=(b+a)/2;
			a=aa,b=bb,c=cc;
		}
		cout << a+b+c << endl;
	}
	
}