给定一个二叉树,它的每个结点都存放一个0-9的数字,每条从根到叶子节点的路径都代表一个数字。 例如,从根到叶子节点路径1->2->3代表数字123。 计算从根到叶子节点生成的所有数字之和。 说明:叶子节点是指没有子节点的节点。 示例1: 输入: [1,2,3]1 / \ 2 3输出: 25解释:从根到叶子节点路径 1->2...
Right != nil { result += dfs(root.Right, pathSum + root.Right.Val) } return result } 题目链接: Sum Root to Leaf Numbers : leetcode.com/problems/s 求根节点到叶节点数字之和: leetcode.cn/problems/su LeetCode 日更第 365 天,感谢阅读至此的你 欢迎点赞、收藏、在看鼓励支持小满...
问题 给定一个节点取值只包含数字0-9的二叉树,每条根节点至叶子节点的路径都可以表示一个数字。 例如,根至叶子路径1->2->3表示数字123。 求所有根至叶子数字的和。 例如, 1 / \ 2 3 根至叶子路径1->2表示数字12 根至叶子路径1->3表示数字13 返回值sum=12+13=25 初始思路 要求和就必须把所有路径列...
Can you solve this real interview question? Sum Root to Leaf Numbers - You are given the root of a binary tree containing digits from 0 to 9 only. Each root-to-leaf path in the tree represents a number. * For example, the root-to-leaf path 1 -> 2 -> 3
The root-to-leaf path 1->3 represents the number 13. Return the sum = 12 + 13 = 25. 这道题就是一个简单的DFS深度优先遍历。 注意对叶子节点的判断。 代码如下: AI检测代码解析 import java.util.ArrayList; import java.util.List; /*class TreeNode ...
LeetCode: Sum Root to Leaf Numbers [129] 【题目】 Given a binary tree containing digits from0-9only, each root-to-leaf path could represent a number. An example is the root-to-leaf path1->2->3which represents the number123. Find the total sum of all root-to-leaf numbers....
题目链接:Path Sum II | LeetCode OJ Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. For example: Given the below binary tree and sum = 22, 5 /\ 48 //\ 11134 /\/\ ...
An example is the root-to-leaf path 1->2->3 which represents the number 123. Find the total sum of all root-to-leaf numbers. Note: A leaf is a node with no children. Example: Input: [1,2,3] 1 / 2 3 Output: 25 Explanation: ...
The idea of this is to push all the left subtree nodes in the stack. then check if the leftest node has a right child if it has, we will go through all its right children tree nodes until the leaf node. The trick one is where to push the right node and where to delete them. ...
Given the root of a binary tree, return the number of nodes where the value of the node is equal to the sum of the values of its descendants. A descendant of a node x is any node that is on the path from node x to some leaf node. The sum is considered to be 0 if the node ...