https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal/ 思路,如果无从下手,先要了解二叉树的广度优先遍历 BSF : https://www.cnblogs.com/Jomini/p/12032020.html 参考答案: https://blog.csdn.net/qq_39313597/article/detail
https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/ 题目大意 按照层次遍历,先从左到右,再从右到左,依次如此遍历二叉树 解题思路 仍然按照从左到右层次遍历,存储上一层的遍历方向,判断若本次应该从右到左,将本层结点遍历结果倒序即可。 C++代码 classSolution{public:vector<vector<int>> z...
vector<vector<int>> zigzagLevelOrder(TreeNode* root) { vector<vector<int> > result; if(!root)returnresult; levelTraversal(root,1,true, result); returnresult; } voidlevelTraversal(TreeNode* root,intlevel,intleftToRight,vector<vector<int> >& result){ if(!root)return; if(result.size() <...
val); } level = curLevel + 1; treeNode.offer(curNode.left); nodeLevel.offer(level); treeNode.offer(curNode.right); nodeLevel.offer(level); } } return ans; } 第二种方案 把102 题 的解释贴过来。 我们在 while 循环中加一个 for 循环,循环次数是循环前的队列中的元素个数即可,使得每次的...
* Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). * <p> * For example: * Given binary tree [3,9,20,null,null,15,7], * 3 * / \ * 9 20 * / \ * ...
Binary Tree Zigzag Level Order Traversal Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tree{3,9,20,#,#,15,7}, ...
LeetCode :: Binary Tree Zigzag Level Order Traversal [tree, BFS],Givenabinarytree,returnthezigzaglevelordertraversalofitsnodes'values.(ie,fromlefttoright,thenrighttoleftforthenextlevelandal...
Given binary tree[3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 1. 2. 3. 4. 5. return its zigzag level order traversal as: [ [3], [20,9], [15,7] ] 1. 2. 3. 4. 5. 二叉树的锯齿形层序遍历。 题意是给一个二叉树,对其进行层序遍历,但是在遍历每一层的时候要一次从左...
Binary Tree Zigzag Level Order Traversal.md Verified 4300b6d colorbox mentioned this pull request Mar 1, 2025 103. Binary Tree Zigzag Level Order Traversal colorbox/leetcode#41 Open Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment ...
103. Binary Tree Zigzag Level Order Traversal Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tree [3,9,20,null,null,15,7], 代码语言:...