Compilare: main.cpp: In function 'void dijk(int)': main.cpp:38:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (int i = 0; i< adiac[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp:34:13: warning: unused variable 'd' [-Wunused-variable] 34 | int d = pq.top().second; | ^ main.cpp: In function 'int main()': main.cpp:69:12: warning: unused variable 'j' [-Wunused-variable] 69 | int i, j, x, y, c, d, xmin=0; | ^ main.cpp:69:27: warning: unused variable 'xmin' [-Wunused-variable] 69 | int i, j, x, y, c, d, xmin=0; | ^~~~