Compilare: main.cpp: In function 'void min_spanning_tree()': main.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<muchie>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (int i = 0; i < G[muchie_curenta.to].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:77:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for (int j = 0; j < capete_muchie[i].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~