Eroare de compilare: main.cpp:26:14: error: variable 'std::ifstream cin' has initializer but incomplete type ifstream cin ("ruksak.in"); ^ main.cpp:27:15: error: variable 'std::ofstream cout' has initializer but incomplete type ofstream cout ("ruksak.out"); ^ main.cpp: In function 'int main()': main.cpp:60:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<ob.size(); i++){ ~^~~~~~~~~~ Non zero exit status: 1