算法路径遍历序列从前的相关内容

代码随想录算法训练营第十八天 | 力扣 513. 找树左下角的值、112. 路径总和、113. 路径总和 II、106. 从中序与后序遍历序列构造二叉树、105. 从前序与中序遍历序列构造二叉树

1. LeetCode 513. 找树左下角的值1.1 思路运用迭代法层序遍历很简单，就最后一层第一个。以下讲解递归法在这题只要我们求深度最大的叶子节点，就一定是在最后一行。那么问题是最后一行怎么求第一个元素呢？这题前中后序都是可以的，“根左右”、“左根右”、“左右根”，因为这...

算法训练Day18|● 513.找树左下角的值● 112. 路径总和 113.路径总和ii● 106.从中序与后序遍历序列构造二叉树 105.从前序与中序遍历序列构造二叉树

LeetCode:513.找树左下角的值513.找树左下角的值-力扣（leetcode）1.思路迭代法：层序遍历，借助队列循环判断，很容易理解。递归法：很绕====,画图走一遍，基本理解了2.代码实现 1// 迭代法 2class Solution { 3 4...

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