import java.util.Queue; import java.util.LinkedList; public class BinaryTreeLevelOrder { public static class TreeNode { int data; TreeNode left; TreeNode right; TreeNode(int data) { this.data=data; } } // prints in level order public static void levelOrderTraversal(TreeNode startNode) {...
454647thisLevelList.add(currentNode.val);48if(currentNode.left !=null)49q.add(currentNode.left);50if(currentNode.right !=null)51q.add(currentNode.right);52}5354answerList.add(thisLevelList);55}56returnanswerList;57}58} 还要积累一下java中队列的使用方法: 1.声明和初始化: Queue<TreeNode> q...
Given a binary tree, return thelevel ordertraversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree{3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its level order traversal as: [ [3], [9,20], [15,7] ] 实现的关键在于定...
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree [3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 return its level order traversal as: [ [3], [9,20], [15,7] ] 1. 2....
Binary Tree Level Order Traversal Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree [3,9,20,null,null,15,7], 3 / \ 9 20
【LeetCode-面试算法经典-Java实现】【全部题目文件夹索引】 原题 Given a binary tree, return the bottom-up level order traversal of its nodes’ values. (ie, from left to right, level by level from leaf to root). For example: Given binary tree {3,9,20,#,#,15,7}, ...
Binary+Tree+Level+Order+Traversal">https://www.cwiki.us/display/ITCLASSIFICATION/Binary+Tree+Level+Order+Traversal* @seehttps://www.lintcode.com/problem/binary-tree-level-order-traversal* * ** @author YuCheng**/publicclassLintCode0069LevelOrderTest{privatefinalstaticLoggerlogger=LoggerFactory.getLogg...
Given binary tree [3,9,20,null,null,15,7]. ** 3 / 9 20 / 15 7** return its level order traversal as: [ [3], [9,20], [15,7] ] My Solution (Java) Version 1 Time: 3ms: 队列这个结构就巧妙地把二叉树的立体结构变成线性结构了,也是一种巧妙地遍历方式,先遍历每个小树的根结点,然...
Binary Tree Level Order Traversal Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree [3,9,20,null,null,15,7], 代码语言:javascript ...
Binary Tree InOrder traversal in Java without Recursion The steps for inorder traversal will remain the same with recursion and without it. The key is how to use a Stack to convert a recursive algorithm to an iterative one. Since we need to explore the left tree, we start with the root...