/in/foo.cc: In member function 'SortedSeqList SortedSeqList::merge(const SortedSeqList&) const':
/in/foo.cc:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while (i < data.size() && j < other.data.size())
                ~~^~~~~~~~~~~~~
/in/foo.cc:32:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while (i < data.size() && j < other.data.size())
                                   ~~^~~~~~~~~~~~~~~~~~~
/in/foo.cc:46:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while (i < data.size())
                ~~^~~~~~~~~~~~~
/in/foo.cc:51:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while (j < other.data.size())
                ~~^~~~~~~~~~~~~~~~~~~
/in/foo.cc: In member function 'void SortedSeqList::print() const':
/in/foo.cc:62:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 1; i < data.size(); ++i)
                         ~~^~~~~~~~~~~~~