/in/foo.cc: In function 'int main()':
/in/foo.cc:28:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |         if (adj[i].size() > (int) max_deg) {
      |             ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~