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: 输入:root = [3,5,1,6,2,0,8,null,null,7,4], target = 5, k = 2输出:[7,4,1]解释:所求结点为与目标结点(值为 5)距离为 2 的结点,值分别为 7,4
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 ...
* Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ classSolution{ public: vector<int>distanceK(TreeNode*root,TreeNode*target,intk) { ...
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...
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
Can you solve this real interview question? Subarray Sum Equals K - Given an array of integers nums and an integer k, return the total number of subarrays whose sum equals to k. A subarray is a contiguous non-empty sequence of elements within an array.
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...
n self.tree[idx] = value while idx > 1: idx //= 2 self.tree[idx] = self.tree[idx * 2] + self.tree[idx * 2 + 1] def query(self, left, right): # Query the sum in [left, right) result = 0 left += self.n right += self.n while left < right: if left & 1: ...
0111-Minimum-Depth-of-Binary-Tree 0112-Path-Sum 0113-Path-Sum-II 0115-Distinct-Subsequences 0116-Populating-Next-Right-Pointers-in-Each-Node 0117-Populating-Next-Right-Pointers-in-Each-Node-II 0118-Pascals-Triangle 0119-Pascals-Triangle-II 0120-Triangle 0121-Best-Time-...
1368-minimum-cost-to-make-at-least-one-valid-path-in-a-grid.js 1369-get-the-second-most-recent-activity.sql 137-single-number-ii.js 1370-increasing-decreasing-string.js 1371-find-the-longest-substring-containing-vowels-in-even-counts.js1373-maximum-sum-bst-in-binary-tree.js ...