Compilare: main.cpp: In function 'void dijkstra(int*)': main.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(i=0; i<v[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:21: warning: unused variable 's' [-Wunused-variable] 67 | int i, a, b, c, s, min_cost=inf, x; | ^ main.cpp:67:24: warning: unused variable 'min_cost' [-Wunused-variable] 67 | int i, a, b, c, s, min_cost=inf, x; | ^~~~~~~~