Compilare: user.cpp: In function ‘void RemoveCycle()’: user.cpp:88:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < edges[i].size(); j++) ^ user.cpp: In function ‘void Solve()’: user.cpp:142:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cycle.size(); i++) ^ user.cpp:145:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cycle.size(); i++) ^