return its level order traversal as: [ [3], [9,20], [15,7] ] OJ's Binary Tree Serialization: The serialization of a binary tree follows a level order traversal, where '#' signifies a path terminator where no node exists below. Here's an example: 1 / \ 2 3 / 4 \ 5 The abov...
Binary Tree Level Order Traversal 题目描述 题目链接:https://leetcode-cn.com/problems/binary-tree-level-order-traversal/ 给定一个二叉树,返回其按层次遍历的节点值。 (即逐层地,从左到右访问所有节点)。 例如: 给定二叉树: [3,9,20,null,null,15,7], 返回其层次遍历结果: 解题方案 迭代 设置一个...
}private:voidlevelOrder(TreeNode* root,intcurrLevel) {if(root == NULL)return;if(res.empty() || currLevel > (res.size() -1)) res.push_back(vector<int>()); res[currLevel].push_back(root->val); levelOrder(root->left, currLevel +1); levelOrder(root->right, currLevel +1); } ...
push(NULL); 29 int nLevelCount = 1; 30 while (true) { 31 TreeNode *pTemp = tree_queue.front(); 32 tree_queue.pop(); 33 if (pTemp == NULL) { 34 if (nLevelCount%2 == 0) { //if the num of level is odd, swap the ivec; 35 Swap(ivec); 36 } 37 tree_vector.push_...
return its level order traversal as: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 [[3],[9,20],[15,7]] 解法 这道题适合用广度优先搜索(BFS),以及 BFS 适用于什么样的场景。 DFS(深度优先搜索)和 BFS(广度优先搜索)就像孪生兄弟,提到一个总是想起另一个。然而在实际使用中,我们用 DFS 的时候...
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,#,#,15,7}, 3 / \ 9 20 / \ 15 7
Zigzag Traversal (medium) Level Averages in a Binary Tree (easy) Minimum Depth of a Binary Tree (easy) Level Order Successor (easy) Connect Level Order Siblings (medium) 8. Pattern: Tree Depth First Search,树上的DFS 树形DFS基于深搜(Depth First Search (DFS))技术来实现树的遍历。 咱们可以...
107Binary Tree Level Order Traversal IIC++ 106Construct Binary Tree from Inorder and Postorder TraversalC 105Construct Binary Tree from Preorder and Inorder TraversalC 104Maximum Depth of Binary TreeC 103Binary Tree Zigzag Level Order TraversalC++ ...
0106 Construct Binary Tree from Inorder and Postorder Traversal Go 57.3% Medium 0107 Binary Tree Level Order Traversal II Go 60.2% Medium 0108 Convert Sorted Array to Binary Search Tree Go 68.9% Easy 0109 Convert Sorted List to Binary Search Tree Go 57.2% Medium 0110 Balanced Binary Tree...
return its level order traversal as: [ [3], [9,20], [15,7] ] 问题 力扣 给定一个二叉树,返回其按层次遍历的节点值。 (即逐层地,从左到右访问所有节点)。 例如: 给定二叉树:[3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 ...