给你二叉树的根结点 root ,请你将它展开为一个单链表: 展开后的单链表应该同样使用 TreeNode ,其中 right 子指针指向链表中下一个结点,而左子指针始终为 null 。 展开后的单链表应该与二叉树 先序遍历 顺序相同。 总结下 介绍了二叉树的的一些基本概念包括:根节点、叶子节点、高度等等; 介绍了基础算法递归的...
一般来说,节点多指计算机网络中的物理节点,而算法中的Node通常译为结点。 结点的度(degrees):结点子树的个数。 结点的层(levels):如果根结点的层定义为1(有时候定义为0),根的子结点为第2层结点,以此类推。 树的深度:树中最大的结点层。 满二叉树(Full Binary Tree):除叶子结点的度为0外,其余所有结点的度...
7//右节点8publicvarright: TreeNode?9//初始化方法10publicinit(_ val: Int) {11self.val =val12self.left =nil13self.right =nil14}1516//获取指定节点的最大深度17func getMaxDepth(_ node:TreeNode?) ->Int18{19//假如指定的节点为空,则返回值为020//节点为空时21ifnode == nil{return0}22/...
public void setLeft(BinaryTreeNode<T> left) { this.left = left; } public void insertLeft(T data) { setLeft(new BinaryTreeNode<T>(data)); } public void setRight(BinaryTreeNode<T> right) { this.right = right; } public void insertRight(T data) { setRight(new BinaryTreeNode<T>(da...
class Solution: def has_circle(self, i: int, p_array: List[int]) -> bool: j = p_array[i] while j != -1: if j == i: return True j = p_array[j] return False def validateBinaryTreeNodes(self, n: int, leftChild: List[int], rightChild: List[int]) -> bool: p_array ...
1. Maximum Depth of Binary Tree 解法1: class Solution: def maxDepth(self, root: TreeNode) -> int: self.answer = 0 self.helper(root,0) return self.answer def helper(self,node,depth): if node is None: self.answer=max(self.answer,depth) else: self.helper(node.left,depth+1) self....
* var ti = TreeNode(5) * var v = ti.`val` * Definition for a binary tree node. * class TreeNode(var `val`: Int) { * var left: TreeNode? = null * var right: TreeNode? = null * } *//** * Queue Solution */funlevelOrder(root:TreeNode?):List<List<Int>>{val ans=mutabl...
insertTreeNode=(root,v)=>{letqueue=[root]while(true){varnode=queue.pop()if(!node.value){node.value=vbreak}if(!node.left){node.left={value:v}break}else{queue.unshift(node.left)}if(!node.right){node.right={value:v}break}else{queue.unshift(node.right)}}console.log('tree',root)} ...
Thedegree of a treeis the maximum degree of the nodes in the tree. A node with degree zero is aleaforterminalnode. A node that has subtrees is theparentof the roots of the subtrees, and the roots of the subtrees are thechildrenof the node. ...
// 向以node为根的二分搜索树中插入元素e,递归算法 private void add(Node node, E e){ if(e.equals(node.e)) return; else if(e.compareTo(node.e) < 0 && node.left == null){ node.left = new Node(e); size ++; return; }