Compilare: user.cpp: In function ‘void DFSpost(int)’: user.cpp:15:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[nod].size(); ++i) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:25:32: 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:53:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < comp[i].size(); ++j) ^