foo.cc: In function ‘int main()’:
foo.cc:32:18: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   32 |         while (i < va.size() && j < vb.size())
      |                ~~^~~~~~~~~~~
foo.cc:32:35: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   32 |         while (i < va.size() && j < vb.size())
      |                                 ~~^~~~~~~~~~~
foo.cc:50:18: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   50 |         while (i < va.size())
      |                ~~^~~~~~~~~~~
foo.cc:55:18: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   55 |         while (j < vb.size())
      |                ~~^~~~~~~~~~~