Compilare: user.cpp: In function ‘bool bfs()’: user.cpp:36:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[nod].sz();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:73:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[n].sz();i++){ ^ user.cpp:95:11: warning: ‘flow’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << flow << '\n'; ^