Compilare: user.cpp: In function ‘std::vector<std::pair<long int, long int> > APM(std::vector<std::pair<std::pair<long int, long int>, long int> >, long int, long int&)’: user.cpp:64:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < muchiiCost.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:91:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < APMedges.size(); i++) ^