#include<bits/stdc++.h>
#define REP(i,n) for(int i=0,i##_len=int(n);i<i##_len;++i)
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
#define All(x) (x).begin(),(x).end()
#define rAll(x) (x).rbegin(),(x).rend()
using namespace std;
using ll = long long;

int main(){
    int t;cin>>t;
    REP(_,t) {
        ll a,b,c,k;
        cin>>a>>b>>c>>k;
        while(k--) {
            if(a==b && b==c) break;
            ll tmp[3] = {(b+c) / 2, (a+c) / 2, (a+b) / 2};
            a = tmp[0];
            b = tmp[1];
            c = tmp[2];
        }
        // cerr << a << " " << b << " " << c << "\n";
        cout << a + b + c << "\n";
    }
}