Compilare: main.cpp: In function 'void create_minimum_spanning_tree(int&, int)': main.cpp:63:76: warning: comparison of integer expressions of different signedness: 'std::queue<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 63 | while (!ordered_edges_queue.empty() && minimum_spanning_tree_edges.size() != nr_nodes - 1) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~