Given the below binary tree, 1 / \ 2 3 Return 6. 2.解法分析: leetcode中给出的函数头为:int maxPathSum(TreeNode *root) 给定的数据结构为: Definitionforbinary tree *structTreeNode { *intval; * TreeNode *left; * TreeNode *right; * TreeNode(intx) : val(x), left(NULL), right(NULL...
}intcurMax(TreeNode *root) {if(!root)return0;returnroot -> val + oneSide(root -> left) + oneSide(root ->right); }//对每个节点遍历求左右两个节点的做大加上本身,然后取最大的值就是maximum path sum了intmaxPathSum(TreeNode *root) {if(!root)return0;inttmpl = INT_MIN, tmpr =INT_...
/* * @lc app=leetcode id=124 lang=javascript * * [124] Binary Tree Maximum Path Sum *//** * Definition for a binary tree node. * function TreeNode(val) { * this.val = val; * this.left = this.right = null; * } */function helper(node, payload) { if (node === n...
int max_path_sum = root->val + leftTree.first + rightTree.first; max_path_sum = max(max_sub_sum, max_path_sum); return make_pair(single_path_sum, max_path_sum); } public: /** * @param root: The root of binary tree. * @return: An integer */ int maxPathSum(TreeNode *roo...
LeetCode—124.二叉树中的最大路径和[Binary Tree Maximum Path Sum]——分析及代码[C++] 一、题目 二、分析及代码 1. 迭代 (1)思路 (2)代码 (3)结果 三、其他 一、题目 给定一个非空二叉树,返回其最大路径和。 本题中,路径被定义为一条从树中任意节点出发,达到任意节点的序列。该路径至少包含一个...
Binary Tree Maximum Path Sum@LeetCode Binary Tree Maximum Path Sum 动态规划+深度优先搜索。把大问题(求整棵树的路径最大值)拆分成小问题(每颗子树的路径最大值),递推公式为:当前树的路径最大值=max(左子树的路径最大值, 右子树的路径最大值)+当前根节点的值。以此来推出最后全树的最大路径值。
classSolution{intmax=Integer.MIN_VALUE;publicintmaxPathSum(TreeNode root){dfs(root);returnmax;}publicintdfs(TreeNode root){if(root==null)return0;intleft=dfs(root.left);intright=dfs(root.right);//作为该路径的终点intend=Math.max(Math.max(left,right)+root.val,root.val);//作为该路径的中间...
Leetcode Binary Tree Maximum Path Sum Given a binary tree, find the maximum path sum. The path may start and end at any node in the tree. For example: Given the below binary tree, 1 / \ 2 3 1. 2. 3. Return6. 对于每个结点,我们需要比较三个值。
Given a binary tree, find the maximum path sum. The path may start and end at any node in the tree. For example: Given the below binary tree, AI检测代码解析 1 / \ 2 3 1. 2. 3. Return6. 题意: 给定一棵二叉树,找出最大得路径和。
Given a non-empty binary tree, find the maximum path sum. For this problem, a path is defined as any sequence of nodes from some starting node to any node in the tree along the parent-child connections. The path must contain at least one node and does not need to go through the root...