leetcode.com 2025-05-23
🔴3068.find-the-maximum-sum-of-node-values
🏷️ Tags
#greedy #bit_manipulation #tree #array #dynamic_programming #sorting
🔴3068.find-the-maximum-sum-of-node-values
🏷️ Tags
#greedy #bit_manipulation #tree #array #dynamic_programming #sorting
Telegraph
find-the-maximum-sum-of-node-values
There exists an undirected tree with n nodes numbered 0 to n - 1. You are given a 0-indexed 2D integer array edges of length n - 1, where edges[i] = [ui, vi] indicates that there is an edge between nodes ui and vi in the tree. You are also given a positive…
leetcode.cn 2025-05-28
🟡3372.maximize-the-number-of-target-nodes-after-connecting-trees-i
🏷️ Tags
#tree #depth_first_search #breadth_first_search
🟡3372.maximize-the-number-of-target-nodes-after-connecting-trees-i
🏷️ Tags
#tree #depth_first_search #breadth_first_search
Telegraph
maximize-the-number-of-target-nodes-after-connecting-trees-i
有两棵 无向 树,分别有 n 和 m 个树节点。两棵树中的节点编号分别为[0, n - 1] 和 [0, m - 1] 中的整数。 给你两个二维整数 edges1 和 edges2 ,长度分别为 n - 1 和 m - 1 ,其中 edges1[i] = [ai, bi] 表示第一棵树中节点 ai 和 bi 之间有一条边,edges2[i] = [ui, vi] 表示第二棵树中节点 ui 和 vi 之间有一条边。同时给你一个整数 k 。 如果节点 u 和节点 v 之间路径的边数小于等于 k ,那么我们称节点…
leetcode.com 2025-05-28
🟡3372.maximize-the-number-of-target-nodes-after-connecting-trees-i
🏷️ Tags
#tree #depth_first_search #breadth_first_search
🟡3372.maximize-the-number-of-target-nodes-after-connecting-trees-i
🏷️ Tags
#tree #depth_first_search #breadth_first_search
Telegraph
maximize-the-number-of-target-nodes-after-connecting-trees-i
There exist two undirected trees with n and m nodes, with distinct labels in ranges [0, n - 1] and [0, m - 1], respectively. You are given two 2D integer arrays edges1 and edges2 of lengths n - 1 and m - 1, respectively, where edges1[i] = [ai, bi] indicates…
leetcode.cn 2025-05-29
🔴3373.maximize-the-number-of-target-nodes-after-connecting-trees-ii
🏷️ Tags
#tree #depth_first_search #breadth_first_search
🔴3373.maximize-the-number-of-target-nodes-after-connecting-trees-ii
🏷️ Tags
#tree #depth_first_search #breadth_first_search
Telegraph
maximize-the-number-of-target-nodes-after-connecting-trees-ii
有两棵 无向 树,分别有 n 和 m 个树节点。两棵树中的节点编号分别为[0, n - 1] 和 [0, m - 1] 中的整数。 给你两个二维整数 edges1 和 edges2 ,长度分别为 n - 1 和 m - 1 ,其中 edges1[i] = [ai, bi] 表示第一棵树中节点 ai 和 bi 之间有一条边,edges2[i] = [ui, vi] 表示第二棵树中节点 ui 和 vi 之间有一条边。 如果节点 u 和节点 v 之间路径的边数是偶数,那么我们称节点 u 是节点 v 的 目标节…
leetcode.com 2025-05-29
🔴3373.maximize-the-number-of-target-nodes-after-connecting-trees-ii
🏷️ Tags
#tree #depth_first_search #breadth_first_search
🔴3373.maximize-the-number-of-target-nodes-after-connecting-trees-ii
🏷️ Tags
#tree #depth_first_search #breadth_first_search
Telegraph
maximize-the-number-of-target-nodes-after-connecting-trees-ii
There exist two undirected trees with n and m nodes, labeled from [0, n - 1] and [0, m - 1], respectively. You are given two 2D integer arrays edges1 and edges2 of lengths n - 1 and m - 1, respectively, where edges1[i] = [ai, bi] indicates that there is an…
leetcode.cn 2025-07-24
🔴2322.minimum-score-after-removals-on-a-tree
🏷️ Tags
#bit_manipulation #tree #depth_first_search #array
🔴2322.minimum-score-after-removals-on-a-tree
🏷️ Tags
#bit_manipulation #tree #depth_first_search #array
Telegraph
minimum-score-after-removals-on-a-tree
存在一棵无向连通树,树中有编号从 0 到 n - 1 的 n 个节点, 以及 n - 1 条边。 给你一个下标从 0 开始的整数数组 nums ,长度为 n ,其中 nums[i] 表示第 i 个节点的值。另给你一个二维整数数组 edges ,长度为 n - 1 ,其中 edges[i] = [ai, bi] 表示树中存在一条位于节点 ai 和 bi 之间的边。 删除树中两条 不同 的边以形成三个连通组件。对于一种删除边方案,定义如下步骤以计算其分数:
leetcode.com 2025-07-24
🔴2322.minimum-score-after-removals-on-a-tree
🏷️ Tags
#bit_manipulation #tree #depth_first_search #array
🔴2322.minimum-score-after-removals-on-a-tree
🏷️ Tags
#bit_manipulation #tree #depth_first_search #array
Telegraph
minimum-score-after-removals-on-a-tree
There is an undirected connected tree with n nodes labeled from 0 to n - 1 and n - 1 edges. You are given a 0-indexed integer array nums of length n where nums[i] represents the value of the ith node. You are also given a 2D integer array edges of length…
leetcode.cn 2025-11-28
🔴2872.maximum-number-of-k-divisible-components
🏷️ Tags
#tree #depth_first_search
🔴2872.maximum-number-of-k-divisible-components
🏷️ Tags
#tree #depth_first_search
Telegraph
maximum-number-of-k-divisible-components
给你一棵 n 个节点的无向树,节点编号为 0 到 n - 1 。给你整数 n 和一个长度为 n - 1 的二维整数数组 edges ,其中 edges[i] = [ai, bi] 表示树中节点 ai 和 bi 有一条边。 同时给你一个下标从 0 开始长度为 n 的整数数组 values ,其中 values[i] 是第 i 个节点的 值 。再给你一个整数 k 。 你可以从树中删除一些边,也可以一条边也不删,得到若干连通块。一个 连通块的值 定义为连通块中所有节点值之和。如果所有连通块的值都可以被 k 整除,那么我们说这是一个…
leetcode.com 2025-11-28
🔴2872.maximum-number-of-k-divisible-components
🏷️ Tags
#tree #depth_first_search
🔴2872.maximum-number-of-k-divisible-components
🏷️ Tags
#tree #depth_first_search
Telegraph
maximum-number-of-k-divisible-components
There is an undirected tree with n nodes labeled from 0 to n - 1. You are given the integer n and a 2D integer array edges of length n - 1, where edges[i] = [ai, bi] indicates that there is an edge between nodes ai and bi in the tree. You are also given a…
leetcode.cn 2025-12-16
🔴3562.maximum-profit-from-trading-stocks-with-discounts
🏷️ Tags
#tree #depth_first_search #array #dynamic_programming
🔴3562.maximum-profit-from-trading-stocks-with-discounts
🏷️ Tags
#tree #depth_first_search #array #dynamic_programming
Telegraph
maximum-profit-from-trading-stocks-with-discounts
给你一个整数 n,表示公司中员工的数量。每位员工都分配了一个从 1 到 n 的唯一 ID ,其中员工 1 是 CEO。另给你两个下标从 1 开始的整数数组 present 和 future,两个数组的长度均为 n,具体定义如下:
leetcode.com 2025-12-16
🔴3562.maximum-profit-from-trading-stocks-with-discounts
🏷️ Tags
#tree #depth_first_search #array #dynamic_programming
🔴3562.maximum-profit-from-trading-stocks-with-discounts
🏷️ Tags
#tree #depth_first_search #array #dynamic_programming
Telegraph
maximum-profit-from-trading-stocks-with-discounts
You are given an integer n, representing the number of employees in a company. Each employee is assigned a unique ID from 1 to n, and employee 1 is the CEO. You are given two 1-based integer arrays, present and future, each of length n, where:
leetcode.cn 2026-01-06
🟡1161.maximum-level-sum-of-a-binary-tree
🏷️ Tags
#tree #depth_first_search #breadth_first_search #binary_tree
🟡1161.maximum-level-sum-of-a-binary-tree
🏷️ Tags
#tree #depth_first_search #breadth_first_search #binary_tree
Telegraph
maximum-level-sum-of-a-binary-tree
给你一个二叉树的根节点 root。设根节点位于二叉树的第 1 层,而根节点的子节点位于第 2 层,依此类推。 返回总和 最大 的那一层的层号 x。如果有多层的总和一样大,返回其中 最小 的层号 x。 示例 1: 输入:root = [1,7,0,7,-8,null,null] 输出:2 解释: 第 1 层各元素之和为 1, 第 2 层各元素之和为 7 + 0 = 7, 第 3 层各元素之和为 7 + -8 = -1, 所以我们返回第 2 层的层号,它的层内元素之和最大。 示例 2: 输入:root =…
leetcode.com 2026-01-06
🟡1161.maximum-level-sum-of-a-binary-tree
🏷️ Tags
#tree #depth_first_search #breadth_first_search #binary_tree
🟡1161.maximum-level-sum-of-a-binary-tree
🏷️ Tags
#tree #depth_first_search #breadth_first_search #binary_tree
Telegraph
maximum-level-sum-of-a-binary-tree
Given the root of a binary tree, the level of its root is 1, the level of its children is 2, and so on. Return the smallest level x such that the sum of all the values of nodes at level x is maximal. Example 1: Input: root = [1,7,0,7,-8,null,null] Output:…
leetcode.cn 2026-01-07
🟡1339.maximum-product-of-splitted-binary-tree
🏷️ Tags
#tree #depth_first_search #binary_tree
🟡1339.maximum-product-of-splitted-binary-tree
🏷️ Tags
#tree #depth_first_search #binary_tree
Telegraph
maximum-product-of-splitted-binary-tree
给你一棵二叉树,它的根为 root 。请你删除 1 条边,使二叉树分裂成两棵子树,且它们子树和的乘积尽可能大。 由于答案可能会很大,请你将结果对 10^9 + 7 取模后再返回。 示例 1: 输入:root = [1,2,3,4,5,6] 输出:110 解释:删除红色的边,得到 2 棵子树,和分别为 11 和 10 。它们的乘积是 110 (11*10) 示例 2: 输入:root = [1,null,2,3,4,null,null,5,6] 输出:90 解释:移除红色的边,得到 2 棵子树,和分别是…
leetcode.com 2026-01-07
🟡1339.maximum-product-of-splitted-binary-tree
🏷️ Tags
#tree #depth_first_search #binary_tree
🟡1339.maximum-product-of-splitted-binary-tree
🏷️ Tags
#tree #depth_first_search #binary_tree
Telegraph
maximum-product-of-splitted-binary-tree
Given the root of a binary tree, split the binary tree into two subtrees by removing one edge such that the product of the sums of the subtrees is maximized. Return the maximum product of the sums of the two subtrees. Since the answer may be too large, return…
leetcode.cn 2026-01-09
🟡865.smallest-subtree-with-all-the-deepest-nodes
🏷️ Tags
#tree #depth_first_search #breadth_first_search #hash_table #binary_tree
🟡865.smallest-subtree-with-all-the-deepest-nodes
🏷️ Tags
#tree #depth_first_search #breadth_first_search #hash_table #binary_tree
Telegraph
smallest-subtree-with-all-the-deepest-nodes
给定一个根为 root 的二叉树,每个节点的深度是 该节点到根的最短距离 。 返回包含原始树中所有 最深节点 的 最小子树 。 如果一个节点在 整个树 的任意节点之间具有最大的深度,则该节点是 最深的 。 一个节点的 子树 是该节点加上它的所有后代的集合。 示例 1: 输入:root = [3,5,1,6,2,0,8,null,null,7,4] 输出:[2,7,4] 解释: 我们返回值为 2 的节点,在图中用黄色标记。 在图中用蓝色标记的是树的最深的节点。 注意,节点 5、3 和 2 包含树中最深的节点,但节点…
leetcode.com 2026-01-09
🟡865.smallest-subtree-with-all-the-deepest-nodes
🏷️ Tags
#tree #depth_first_search #breadth_first_search #hash_table #binary_tree
🟡865.smallest-subtree-with-all-the-deepest-nodes
🏷️ Tags
#tree #depth_first_search #breadth_first_search #hash_table #binary_tree
Telegraph
smallest-subtree-with-all-the-deepest-nodes
Given the root of a binary tree, the depth of each node is the shortest distance to the root. Return the smallest subtree such that it contains all the deepest nodes in the original tree. A node is called the deepest if it has the largest depth possible among…