Compilare: user.c: In function ‘main’: user.c:93:9: warning: unused variable ‘similar_to’ [-Wunused-variable] int similar_to[100001]; ^ user.c:92:22: warning: unused variable ‘repr_list’ [-Wunused-variable] int nb_repr = 0, repr_list[100000]; ^ user.c:92:9: warning: unused variable ‘nb_repr’ [-Wunused-variable] int nb_repr = 0, repr_list[100000]; ^ user.c:129:27: warning: ‘root’ may be used uninitialized in this function [-Wmaybe-uninitialized] trees[i] = flatten(children, root, 1); ^