Method sz

code/data-structures/avl_tree.cpp:11–11

  avl_tree() : root(NULL) { }
  node *root;
  inline int sz(node *n) const { return n ? n->size : 0; }
  inline int height(node *n) const {
    return n ? n->height : -1; }
  inline bool left_heavy(node *n) const {