Compilare: main.cpp: In member function 'void Graph::apm_Prim(int)': main.cpp:62:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (int i = 0; i < _list2[currentNode].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:79:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for (int i = 0; i < ans.size(); ++i) { | ~~^~~~~~~~~~~~