/in/foo.cc: In function 'void selectionSort(std::vector<Student>&)':
/in/foo.cc:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Student>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for (int i = 0; i < students.size(); ++i) {
      |                  ~~^~~~~~~~~~~~~~~~~
/in/foo.cc:15:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Student>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |   for (int j = i + 1; j < students.size(); ++j) {
      |                       ~~^~~~~~~~~~~~~~~~~