#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

ll INF=2e18;

void solve() {
ll a,b,c,K;cin>>a>>b>>c>>K;

for(ll i=1;i<=min(1000LL,K);i++) {

    ll A,B,C;
A=(b+c)/2;
B=(c+a)/2;
C=(a+b)/2;
a=A,b=B,c=C;

}

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







}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
    ll t;cin>>t;
    for(ll i=0;i<t;i++) {
        solve();
    }
}