Eroare de compilare: user.cpp:10:12: error: variable ‘std::ifstream ff’ has initializer but incomplete type ifstream ff("arbore.in"); ^ user.cpp:11:11: error: variable ‘std::ofstream g’ has initializer but incomplete type ofstream g("arbore.out"); ^ user.cpp: In function ‘void dfs(int)’: user.cpp:26:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<gf[node].size(); ++i){ ^ user.cpp: In function ‘int main()’: user.cpp:52:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<bucket.size(); ++i){ ^