dups = xnmalloc (cnt, sizeof *dups);
values = xnmalloc (cnt, sizeof *values);
sorted_values = xnmalloc (cnt, sizeof *sorted_values);
dups = xnmalloc (cnt, sizeof *dups);
values = xnmalloc (cnt, sizeof *values);
sorted_values = xnmalloc (cnt, sizeof *sorted_values);