qtree\QTREE_dynamic-tree_link-cut-trees.pas .....\QTREE_heavy-light-decomposition_global-balanced-bst.pas .....\QTREE_heavy-light-decomposition_imaginary-bst.pas .....\QTREE_heavy-light-decomposition_segment-tree.pas .....\QTREE_heavy-light-decomposition_splay-tree.pas .....\QTREE解法的一些研究.pdf qtree