Compilare: main.cpp: In function 'void dijkstra(int, int, int)': main.cpp:44:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for (int i = 0; i < graf[nod].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp:38:19: warning: unused variable 'cost' [-Wunused-variable] 38 | long long cost = pq.top().second; | ^~~~ main.cpp: In function 'int main()': main.cpp:118:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 118 | for (int i = 0; i < stiva.size(); ++i) | ~~^~~~~~~~~~~~~~