#include <iostream>
#include <tuple>
using i64 = long long;

int main() {
  int T;
  std::cin >> T;
  while(T--) {
    i64 a, b, c, K;
    std::cin >> a >> b >> c >> K;
    int cnt = 0;
    i64 before = a + b + c;
    for(int k = 0; k < K; k++) {
      std::tie(a, b, c) = std::tuple<i64, i64, i64>((a + b) / 2, (b + c) / 2, (c + a) / 2);
      i64 after = a + b + c;
      if(before == after) {
        cnt++;
      }
      if(cnt > 60) {
        break;
      }
      before = after;
    }
    std::cout << a + b + c << std::endl;
  }
}