/in/foo.cc: In function 'int main()':
/in/foo.cc:26:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for (int i = 0; i < res.size(); i++)
      |                     ~~^~~~~~~~~~~~
/in/foo.cc:29:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         if (i != res.size() - 1)  cout << " ";
      |             ~~^~~~~~~~~~~~~~~~~