Compilare: main.cpp: In function 'void prim()': main.cpp:23:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (int i = 0; i < v[nod].size(); i++){ | ~~^~~~~~~~~~~~~~~ main.cpp:16:13: warning: unused variable 'cost' [-Wunused-variable] 16 | int cost = pq.top().first; | ^~~~