starting from the bottom (i.e. the node furthest away from the root), then every node in the tree will again have a balance factor of -1, 0, or 1.(自
A binary search tree is defined to be an AVL tree if the invariant holds for every node N in the tree. BalanceFactor(N) ∈ {–1,0,+1} A node N with BalanceFactor(N) < 0 is called "left-heavy", one with BalanceFactor(N) > 0 is called "right-heavy", and one with BalanceFac...