Compilare: main.cpp: In function 'int Kruskal()': main.cpp:54:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (int i=0; i<adj_list.size(); i++) | ~^~~~~~~~~~~~~~~~ main.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type] 66 | } | ^