Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:27:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++) ^ user.cpp:29:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++) ^ user.cpp:27:35: warning: ‘f’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i=0;i<G[nod].size();i++) ^