How do we find diameter of a binary tree if parent pointer to each node is given. Definition of tree diameter is : Longest distance between two nodes of tree. 编辑::请使用父指针找到直径。我知道用递归法求出直径,这是通过求出最大直径(左直径、右直径和树高)来实现的。 节点结构如下:类节点{...
According to the definition of LCA on Wikipedia: "The lowest common ancestor of two nodes p & q in a binary tree T is the lowest node that has both p & q as descendants (where we allow a node to be a descendant of itself)." 🐣: 1️⃣ Input: root = [6,2,8,0,4,7,9...