#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")


#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n) - 1; i >= 0; i--)
#define repk(i, k, n) for (int i = k; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define mod1 1000000007
#define mod2 998244353
#define mod3 100000007
#define vi vector<int>
#define vs vector<string>
#define vc vector<char>
#define vl vector<ll>
#define vb vector<bool>
#define vvi vector<vector<int>>
#define vvc vector<vector<char>>
#define vvl vector<vector<ll>>
#define vvb vector<vector<bool>>
#define vvvi vector<vector<vector<int>>>
#define vvvl vector<vector<vector<ll>>>
#define pii pair<int,int>
#define pil pair<int,ll>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define vpii vector<pair<int,int>>
#define vpll vector<pair<ll,ll>>
#define vvpii vector<vector<pair<int,int>>>
#define vvpll vector<vector<pair<ll,ll>>>

template<typename T> void debug(T e){
    cerr << e << endl;
}

template<typename T> void debug(vector<T> &v){
    rep(i, v.size()){
        cerr << v[i] << " ";
    }
    cerr << endl;
}

template<typename T> void debug(vector<vector<T>> &v){
    rep(i, v.size()){
        rep(j, v[i].size()){
            cerr << v[i][j] << " ";
        }
        cerr << endl;
    }
}

template<typename T> void debug(vector<pair<T, T>> &v){
    rep(i,v.size()){
        cerr << v[i].first << " " << v[i].second << endl;
    }
}

template<typename T> void debug(set<T> &st){
    for (auto itr = st.begin(); itr != st.end(); itr++){
        cerr << *itr << " ";
    }
    cerr << endl;
}

template<typename T> void debug(multiset<T> &ms){
    for (auto itr = ms.begin(); itr != ms.end(); itr++){
        cerr << *itr << " ";
    }
    cerr << endl;
}

template<typename T> void debug(map<T, T> &mp){
    for (auto itr = mp.begin(); itr != mp.end(); itr++){
        cerr << itr->first << " " << itr->second << endl;
    }
}

void debug_out(){
    cerr << endl;
}

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T){
    cerr << H << " ";
    debug_out(T...);
}

void dijkstra(vvpll &graph, ll v, vl &dist, vl &cnt){
    priority_queue<pll, vpll, greater<pll>> pque;
    vector<bool> decided(graph.size());
    pque.push(pll(0, v));
    cnt[v] = 1;
    dist[v] = 0;
    while(pque.size()){
        pll p = pque.top();
        pque.pop();
        if (dist[p.second] < p.first){
            continue;
        }
        decided[p.second] = true;
        for (auto x: graph[p.second]){
            if (dist[x.first] + x.second == dist[p.second] && decided[x.first]){
                cnt[p.second] = (cnt[p.second] + cnt[x.first]) % mod1;
            }
        }
        for (auto x: graph[p.second]){
            if (dist[x.first] > dist[p.second] + x.second){
                dist[x.first] = dist[p.second] + x.second;
                pque.push(pll(dist[x.first], x.first));
            }
        }
    }
}



int main(){
    ll T;
    cin >> T;
    while(T--){
        ll a, b, c, K;
        cin >> a >> b >> c >> K;
        for (ll i = 0; i < K; i++){
            if (a == b && a == c){
                break;
            }
            ll tmpa = (b + c) / 2;
            ll tmpb = (a + c) / 2;
            ll tmpc = (a + b) / 2;
            a = tmpa;
            b = tmpb;
            c = tmpc;
        }
        cout << a + b + c << endl;
    }
}