Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<GT[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:52:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<ctc[i].size();j++) ^