LeetCode --- 437. Path Sum III解题报告

最新推荐文章于 2024-07-04 21:39:57 发布

杨鑫newlfe

最新推荐文章于 2024-07-04 21:39:57 发布

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分类专栏： Python 算法 LeetCode 文章标签： LeetCode Path Sum III Python

本文链接：https://blog.youkuaiyun.com/u012965373/article/details/100034698

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这篇博客介绍了如何解决LeetCode上的437题——路径总和III。文章探讨了在具有整数节点值的二叉树中，找出所有和为目标值的下降路径的方法。路径不一定要从根节点或叶节点开始，但必须从父节点向下到子节点。题目限制树的节点不超过1000个，数值范围在-1,000,000到1,000,000之间。" 135912859,9884549,PAM4技术解析：四级脉冲幅度调制的优势,"['光通讯', '数据传输技术', '调制技术', '网络通信']

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You are given a binary tree in which each node contains an integer value.

Find the number of paths that sum to a given value.

The path does not need to start or end at the root or a leaf, but it must go downwards (traveling only from parent nodes to child nodes).

The tree has no more than 1,000 nodes and the values are in the range -1,000,000 to 1,000,000.

Example:

root = [10,5,-3,3,2,null,11,3,-2,null,1], sum = 8

      10
     /  \
    5   -3
   / \    \
  3   2   11
 / \   \
3  -2   1

Return 3. The paths that sum to 8 are:

1.  5 -> 3
2.  5 -> 2 ->