text: #include <iostream>
  #include <vector>
  
  int main()
  {
      std::vector<int> vec;
      int value;
      while (std::cin >> value) {
          vec.push_back(value);
      }
      for (auto i = vec.begin(), j = vec.end() - 1; i != vec.end(); ++i, --j) {
          std::cout << *i + *j << "\n";
      }
      return 0;
  }