#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> P;
#define REP(i,n) for(int i=0;i<int(n);i++)


int main(void){
	cin.tie(nullptr);  ios_base::sync_with_stdio(false);
	ll i,j,k;

	int T;
	cin >> T;
	REP(tc,T){

		ll a,b,c;
		cin >> a >> b >> c >> k;

		for(i=1;i<=k;i++){
			ll x=a,y=b,z=c;
			a=(y+z)/2;
			b=(z+x)/2;
			c=(x+y)/2;

			if(a==b  && b==c && c==a) break;

		}

		cout << a+b+c << endl;


	}


	return 0;
}