Compilare: user.cpp: In function ‘int bfs()’: user.cpp:37:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[V].size();++j) ^ user.cpp: In function ‘int main()’: user.cpp:72:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[nod].size();++j) ^ user.cpp:90:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[nod].size();++j) ^ user.cpp:106:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();++i)cout<<sol[i]<<'\n'; ^