#include<bits/stdc++.h>
using namespace std;
#include<atcoder/all>
using namespace atcoder;
using ll = long long;
ll a,b,c,k;
void solve(){
	for(int i = 0;i<k;i++){
		ll na = (b+c)/2;
		ll nb = (a+c)/2;
		ll nc = (a+b)/2;
		if(a==na&&b==nb&&c==nc){
			break;
		}
		a = na;
		b = nb;
		c = nc;
	}
	cout<<(a+b+c)<<endl;
}

signed main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	int t;
	cin >> t;
	while(t--){
		cin >> a >> b >> c >> k;
		solve();
	}
}