原题链接在此:https://leetcode.com/problems/binary-tree-level-order-traversal/ Given therootof a binary tree, returnthe level order traversal of its nodes' values. (i.e., from left to right, level by level). 给你一个二叉树,请你返回其按 层序遍历 得到的节点值。 (即逐层地,从左到右访...
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 代码运行次数:0 运行 AI代码解释 3/\920/\157 return its level order traversal as: 代码...
107. Binary Tree Level Order Traversal II Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example: Given binary tree[3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 return its ...
"");data=data.replace("}","");String[]vals=data.split(",");// INSERT ROOTTreeNoderoot=newTreeNode(Integer.parseInt(vals[0]));treeList.add(root);intindex=0;booleanisLeftChild=true;for(inti=1;i<vals.length;i++){if(!vals[i]...
Node=treeNode.poll();intcurLevel=nodeLevel.poll();if(curNode!=null){if(ans.size()<=curLevel){ans.add(newArrayList<>());}ans.get(curLevel).add(curNode.val);level=curLevel+1;treeNode.offer(curNode.left);nodeLevel.offer(level);treeNode.offer(curNode.right);nodeLevel.offer(level);}...
AI检测代码解析 # Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val # self.left = left # self.right = right class Solution: def levelOrder(self, root: Optional[TreeNode]) -> List[List[int]]: ...
102 Binary Tree Level Order Traversal 用队列层次遍历 /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {}
Binary Tree Level Order Traversal II是姊妹题,解题思路都是一样的,只是结果要求的顺序是反的,同样有两种方法,也就是经常说到的DFS深度优先遍历和BFS广度优先遍历。 BFS: 广度优先遍历就是一层层地攻略过去,把每一层的所有节点都记录下来再走向下一层。因为每层会有多个节点,不是简单的一个左节点一个右节点的...
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
Given a binary tree, perform vertical traversal on it. In vertical traversal, nodes of a binary tree are printed in vertical order. Assume that the left and right child makes a 45–degree angle with the parent.