Compilare: main.cpp: In member function 'std::pair<int, int>& LotoSolver::makePair()': main.cpp:51:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Suma>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (int i = 0; i < sum.size(); ++i) { | ~~^~~~~~~~~~~~ main.cpp:58:16: warning: reference to local variable 'rasp' returned [-Wreturn-local-addr] 58 | return rasp; | ^~~~ main.cpp:50:24: note: declared here 50 | pair<int, int> rasp = make_pair(-1, -1); | ^~~~