#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <atcoder/modint>
using namespace std;
using i32 = int;
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
#define rep(i,n) for(int i=0; i<(int)(n); i++)
const i64 INF = 1001001001001001001;

i64 GCD(i64 a, i64 b){ return b ? GCD(b,a%b) : a; }

using Modint = atcoder::static_modint<998244353>;


int main(){
    int T; cin >> T;
    rep(i,T){
        i64 a,b,c,k; cin >> a >> b >> c >> k;
        while(k-- > 0){
            if(a == b && b == c) break;
            i64 ap = a, bp = b, cp = c;
            a = (bp+cp) / 2;
            b = (ap+cp) / 2;
            c = (bp+ap) / 2;
        }
        cout << (a+b+c) << '\n';
    }
    return 0;
}



struct ios_do_not_sync{
    ios_do_not_sync(){
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} ios_do_not_sync_instance;