($start,$root)=get_start_root($trees_ref,$$tree_num_ref- +1); heapify($tab_ref,$$trees_ref[$$tree_num_ref-1],$start); ($start,$root) = get_start_root($trees_ref,$$tree_num_ref- +2); heapify($tab_ref,$$trees_ref[$$tree_num_ref-1],$start);