Compilare: main.cpp: In function 'int insert_edge(std::vector<edge>&, edge)': main.cpp:88:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 88 | while (insert_position < edges.size() && edges[insert_position].cost < new_edge.cost) | ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:91:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | if (insert_position == edges.size()) return -1; | ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~