Compilare: main.c: In function 'main': main.c:72:23: warning: unused variable 'current' [-Wunused-variable] 72 | Node *current = queue_dequeue(queue); | ^~~~~~~ main.c:66:9: warning: unused variable 'neighbourCol' [-Wunused-variable] 66 | int neighbourCol[] = {0, 1, 0, -1}; | ^~~~~~~~~~~~ main.c:65:9: warning: unused variable 'neighbourRow' [-Wunused-variable] 65 | int neighbourRow[] = {-1, 0, 1, 0}; | ^~~~~~~~~~~~