Eroare de compilare: user.cpp:6:11: error: variable ‘std::ifstream f’ has initializer but incomplete type ifstream f("cuplaj.in"); ^ user.cpp:7:11: error: variable ‘std::ofstream g’ has initializer but incomplete type ofstream g("cuplaj.out"); ^ user.cpp: In function ‘int Cupleaza(int)’: user.cpp:17:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0; k<G[nod].size(); ++k) ^