foo.cc: In member function 'std::vector<int> seqlist::intersection(seqlist&)':
foo.cc:17:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |         for(int i=0;i<list.size();i++)
      |                     ~^~~~~~~~~~~~
foo.cc: In member function 'bool seqlist::search(int)':
foo.cc:26:22: 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<list.size();i++)
      |                     ~^~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:52:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |     for(int i=0;i<intersection.size();i++)
      |                 ~^~~~~~~~~~~~~~~~~~~~