Compilare: user.cpp: In function ‘bool bfs()’: user.cpp:130:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < V[n].size(); i++) ^ user.cpp: In function ‘void flow()’: user.cpp:210:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < V[i].size(); j++) ^ user.cpp:217:15: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] fo << p << '\n'; ^