Compilare: main.cpp: In function 'int main()': main.cpp:58:24: warning: comparison of integer expressions of different signedness: 'std::vector<muchie>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 58 | if (ans.size() == n - 1) | ~~~~~~~~~~~^~~~~~~~ main.cpp: In instantiation of 'void add_vecin(int, auto:16&, auto:17&, auto:18&, auto:19&) [with auto:16 = std::vector<std::vector<int> >; auto:17 = std::vector<std::vector<int> >; auto:18 = std::set<muchie>; auto:19 = std::vector<bool>]': main.cpp:55:14: required from here main.cpp:24:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int i = 0; i < vecin[nod].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~