Compilare: user.cpp: In function ‘void puncta()’: user.cpp:28:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[x].size(); i++) ^ user.cpp: In function ‘void punctb()’: user.cpp:56:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[nod].size(); i++) ^ user.cpp:52:21: warning: ‘nod’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(!h.empty()&&nod!=n) ^