Compilare: main.cpp: In function 'long long int BF()': main.cpp:22:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<G[nod].size(); j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[n].size();i++) ~^~~~~~~~~~~~