Compilare: main.cpp: In function 'void dijkstra()': main.cpp:91:69: warning: converting to non-pointer type 'long int' from NULL [-Wconversion-null] 91 | (FRIENDS[node] == true) ? now_energy = def_energy : NULL; // recharge if current base is friendly | ^~~~ main.cpp: In function 'void display()': main.cpp:126:40: warning: 'minimum_lantern' may be used uninitialized [-Wmaybe-uninitialized] 126 | fout << minimum_time << " " << minimum_lantern; | ^~~~~~~~~~~~~~~ main.cpp:120:17: note: 'minimum_lantern' was declared here 120 | minimum_lantern; | ^~~~~~~~~~~~~~~