A binary tree is a tree data structure where each node has at most two children, referred to as the left child and right child. Structure 1type TreeNode struct { 2 Val int 3 Left *TreeNode 4 Right *TreeNode 5} 6 7// Helper to create a node 8func NewNode(val int) *TreeNode { 9 return &TreeNode{Val: val} 10} …

A tree is a hierarchical data structure consisting of nodes connected by edges, with one node designated as the root. Unlike binary trees, general trees allow nodes to have any number of children. Definitions Basic Terminology Root: The topmost node with no parent Parent: A node that has one or more child nodes Child: …