给定一个二叉树和一个和,找到所有从根到叶路径总和等于给定总和的路径.例如,给定下面的二叉树和 sum = 22,              5             / \            4   8           /   / \          11  13  4         /  \    / \        7    2  5   1返回[   [5,4,11,2],   [5,8,4,5]] 详见:https://leetcode.com/problems/path…

题目: Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. Note: A leaf is a node with no children. Example: Given the below binary tree and sum = 22, 5 / \ 4 8 / / \ 11 13 4 / \ / \ 7 2 5 1 Return: [ […

给定一个二叉树和一个目标和,找到所有从根节点到叶子节点路径总和等于给定目标和的路径. 说明: 叶子节点是指没有子节点的节点. 示例: 给定如下二叉树,以及目标和 sum = 22, 5 / \ 4 8 / / \ 11 13 4 / \ / \ 7 2 5 1 返回: [ [5,4,11,2], [5,8,4,5] ] class Solution { public: vector<vector<int> > res; vector<vector<int> >…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 文章目录 题目描述 题目大意 解题方法 BFS DFS 日期 题目地址:https://leetcode.com/problems/path-sum-ii/description/ 题目描述 Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given…

给定一个二叉树,二叉树的每个节点含有一个整数.找出路径和等于给定数的路径总数.路径不需要从根节点开始,也不需要在叶节点结束,当路径方向必须是向下的(只从父节点到子节点).二叉树不超过1000个节点,节点的整数值的范围是[-1000000,1000000].示例:root = [10,5,-3,3,2,null,11,3,-2,null,1], sum = 8      10     /  \    5   -3   / \    \  3   2   11 / \   \3  -2   1返回…

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…

437. Path Sum III 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 fro…

原题: 437. Path Sum III 解题: 思路1就是:以根节点开始遍历找到适合路径,以根节点的左孩子节点开始遍历,然后以根节点的右孩子节点开始遍历,不断循环,也就是以每个节点为起始遍历点 代码如下: class Solution { public: int pathSum(TreeNode* root, int sum) { if(!root) return 0; int count = getPath(root,0,sum) + pathSum(root->left,sum) + p…

437. 路径总和 III 给定一个二叉树,它的每个结点都存放着一个整数值. 找出路径和等于给定数值的路径总数. 路径不需要从根节点开始,也不需要在叶子节点结束,但是路径方向必须是向下的(只能从父节点到子节点). 二叉树不超过1000个节点,且节点数值范围是 [-1000000,1000000] 的整数. 示例: root = [10,5,-3,3,2,null,11,3,-2,null,1], sum = 8 10 / \ 5 -3 / \ \ 3 2 11 / \ \ 3 -2 1 返回 3…

437. 路径总和 III 给定一个二叉树,它的每个结点都存放着一个整数值. 找出路径和等于给定数值的路径总数. 路径不需要从根节点开始,也不需要在叶子节点结束,但是路径方向必须是向下的(只能从父节点到子节点). 二叉树不超过1000个节点,且节点数值范围是 [-1000000,1000000] 的整数. 示例: root = [10,5,-3,3,2,null,11,3,-2,null,1], sum = 8 10 / \ 5 -3 / \ \ 3 2 11 / \ \ 3 -2 1 返回 3…