root = [10,5,-3,3,2,null,11,3,-2,null,1], sum = 8 返回3。和等于 8 的路径有: 1. 5 -> 3 2. 5 -> 2 -> 1 3. -3 -> 11 来源:力扣(LeetCode) 链接:https://leetcode-cn.com/problems/path-sum-iii 常规思路:双递归,先序遍历的同时计算每个节点的路径和数量。 1 2 3 4 5 ...
863. 二叉树中所有距离为 K 的结点 - 给定一个二叉树(具有根结点 root), 一个目标结点 target ,和一个整数值 k ,返回到目标结点 target 距离为 k 的所有结点的值的数组。 答案可以以 任何顺序 返回。 示例 1: [https://s3-lc-upload.s3.amazonaws.com/uploads/2
【leetcode】Path Sum II Question: 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 andsum = 22, return Anwser 1: Anwser 2:......
链接:https://leetcode.cn/problems/delete-node-in-a-bst/solutions/1531382/-by-himymben-7sey/ /** * Definition for a binary tree node. * type TreeNode struct { * Val int * Left *TreeNode * Right *TreeNode * }*/funcdeleteNode(root *TreeNode, keyint) *TreeNode {ifroot !=nil {if...
560. 和为 K 的子数组 - 给你一个整数数组 nums 和一个整数 k ,请你统计并返回 该数组中和为 k 的子数组的个数 。 子数组是数组中元素的连续非空序列。 示例 1: 输入:nums = [1,1,1], k = 2 输出:2 示例 2: 输入:nums = [1,2,3], k = 3 输出:2 提示
Can you solve this real interview question? All Nodes Distance K in Binary Tree - Given the root of a binary tree, the value of a target node target, and an integer k, return an array of the values of all nodes that have a distance k from the target node
1679. Max Number of K-Sum Pairs # 题目 # You are given an integer array nums and an integer k. In one operation, you can pick two numbers from the array whose sum equals k and remove them from the array. Return the maximum number of operations you can
The path may start and end at any node in the tree. For example: Given the below binary tree, Return6. Anwser 1 :...Leetcode. Maximum Size Subarray Sum 给定一个无序数组arr, 其中元素可正, 可负, 可0, 给定一个整数k. 求arr所有的子数组中累加和小于或等于k的最长子数组长度. 算法分析...
3.1 Segment Tree 3.2 UnionFind 3.3 LRUCache 3.4 LFUCache 3.5 Binary Indexed Tree 第四章 LeetCode 题解 0001~0099 0001. Two Sum 0002. Add Two Numbers 0003. Longest Substring Without Repeating Characters 0004. Median of Two Sorted Arrays 0005. Longest Palindromic Substring 0006. Zig Zag Conversio...
leetcode-863-All Nodes Distance K in Binary Tree,Converttreetoindirectgraph,thenuseBFStogetKdistancefromtarget.Error:DonotfullyunderstandtheBFS,whenwantstogetsmallestdistance