/in/foo.cc: In function 'int main()':
/in/foo.cc:26:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for (int i = 0; i < primeNumbers.size(); i++) {
      |                     ~~^~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:28:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         if (i < primeNumbers.size() - 1) {
      |             ~~^~~~~~~~~~~~~~~~~~~~~~~~~