Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:48:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp:71:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘void DFS2(int, int)’: user.cpp:89:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<GG[node].size();i++) ^