Eroare de compilare: user.cpp:6:12: error: variable ‘std::ifstream in’ has initializer but incomplete type ifstream in("bellmanford.in"); ^ user.cpp:7:13: error: variable ‘std::ofstream out’ has initializer but incomplete type ofstream out("bellmanford.out"); ^ user.cpp: In function ‘void bellman_ford()’: user.cpp:47:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < Graf[nod].size(); i++) { ^