Compilare: user.cpp: In member function ‘void graf::print(int)’: user.cpp:64:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++i){ ^ user.cpp: In member function ‘void graf::mk_condensation(std::vector<std::vector<int> >&, std::vector<int>&, graf&)’: user.cpp:94:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++i){ ^ user.cpp:98:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++i){ ^ user.cpp:104:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < componente.size(); ++i){ ^ user.cpp: In member function ‘void graf::toposort(std::vector<int>&)’: user.cpp:118:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++i){ ^