Compilare: main.cpp: In function 'int insert_edge(std::vector<edge>&, edge)': main.cpp:59:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | while (poz < edges.size() && edges[poz].cost < new_edge.cost) | ~~~~^~~~~~~~~~~~~~ main.cpp:62:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | if (poz == edges.size()) return -1; | ~~~~^~~~~~~~~~~~~~~