/in/foo.cc: In function 'void DFS(int, int&, int)':
/in/foo.cc:54:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |                 for (int i = 0; i < Gmap[x].size(); i++)
      |                                 ~~^~~~~~~~~~~~~~~~
/in/foo.cc:61:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |                 for (int i = 0; i < Gmap[x].size(); i++)
      |                                 ~~^~~~~~~~~~~~~~~~