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…
leetcode.cn 2026-01-10
🟡712.minimum-ascii-delete-sum-for-two-strings
🏷️ Tags
#string #dynamic_programming
🟡712.minimum-ascii-delete-sum-for-two-strings
🏷️ Tags
#string #dynamic_programming
Telegraph
minimum-ascii-delete-sum-for-two-strings
给定两个字符串s1 和 s2,返回 使两个字符串相等所需删除字符的 ASCII 值的最小和 。 示例 1: 输入: s1 = "sea", s2 = "eat" 输出: 231 解释: 在 "sea" 中删除 "s" 并将 "s" 的值(115)加入总和。 在 "eat" 中删除 "t" 并将 116 加入总和。 结束时,两个字符串相等,115 + 116 = 231 就是符合条件的最小和。 示例 2: 输入: s1 = "delete", s2 = "leet" 输出: 403 解释: 在 "delete"…
leetcode.com 2026-01-10
🟡712.minimum-ascii-delete-sum-for-two-strings
🏷️ Tags
#string #dynamic_programming
🟡712.minimum-ascii-delete-sum-for-two-strings
🏷️ Tags
#string #dynamic_programming
Telegraph
minimum-ascii-delete-sum-for-two-strings
Given two strings s1 and s2, return the lowest ASCII sum of deleted characters to make two strings equal. Example 1: Input: s1 = "sea", s2 = "eat" Output: 231 Explanation: Deleting "s" from "sea" adds the ASCII value of "s" (115) to the sum. Deleting "t"…
leetcode.cn 2026-01-11
🔴85.maximal-rectangle
🏷️ Tags
#stack #array #dynamic_programming #matrix #monotonic_stack
🔴85.maximal-rectangle
🏷️ Tags
#stack #array #dynamic_programming #matrix #monotonic_stack
Telegraph
maximal-rectangle
给定一个仅包含 0 和 1 、大小为 rows x cols 的二维二进制矩阵,找出只包含 1 的最大矩形,并返回其面积。 示例 1: 输入:matrix = [["1","0","1","0","0"],["1","0","1","1","1"],["1","1","1","1","1"],["1","0","0","1","0"]] 输出:6 解释:最大矩形如上图所示。 示例 2: 输入:matrix = [["0"]] 输出:0 示例 3: 输入:matrix = [["1"]] 输出:1 …
leetcode.com 2026-01-11
🔴85.maximal-rectangle
🏷️ Tags
#stack #array #dynamic_programming #matrix #monotonic_stack
🔴85.maximal-rectangle
🏷️ Tags
#stack #array #dynamic_programming #matrix #monotonic_stack
Telegraph
maximal-rectangle
Given a rows x cols binary matrix filled with 0's and 1's, find the largest rectangle containing only 1's and return its area. Example 1: Input: matrix = [["1","0","1","0","0"],["1","0","1","1","1"],["1","1","1","1","1"],["1","0","0","1","0"]] Output: 6…
leetcode.cn 2026-01-14
🔴3454.separate-squares-ii
🏷️ Tags
#segment_tree #array #binary_search #line_sweep
🔴3454.separate-squares-ii
🏷️ Tags
#segment_tree #array #binary_search #line_sweep
Telegraph
separate-squares-ii
给你一个二维整数数组 squares ,其中 squares[i] = [xi, yi, li] 表示一个与 x 轴平行的正方形的左下角坐标和正方形的边长。 找到一个最小的 y 坐标,它对应一条水平线,该线需要满足它以上正方形的总面积 等于 该线以下正方形的总面积。 答案如果与实际答案的误差在 10-5 以内,将视为正确答案。 注意:正方形 可能会 重叠。重叠区域只 统计一次 。 示例 1: 输入: squares = [[0,0,1],[2,2,1]] 输出: 1.00000 解释: 任何在 y =…
leetcode.com 2026-01-14
🔴3454.separate-squares-ii
🏷️ Tags
#segment_tree #array #binary_search #line_sweep
🔴3454.separate-squares-ii
🏷️ Tags
#segment_tree #array #binary_search #line_sweep
Telegraph
separate-squares-ii
You are given a 2D integer array squares. Each squares[i] = [xi, yi, li] represents the coordinates of the bottom-left point and the side length of a square parallel to the x-axis. Find the minimum y-coordinate value of a horizontal line such that the total…
leetcode.cn 2026-01-16
🟡2975.maximum-square-area-by-removing-fences-from-a-field
🏷️ Tags
#array #hash_table #enumeration
🟡2975.maximum-square-area-by-removing-fences-from-a-field
🏷️ Tags
#array #hash_table #enumeration
Telegraph
maximum-square-area-by-removing-fences-from-a-field
有一个大型的 (m - 1) x (n - 1) 矩形田地,其两个对角分别是 (1, 1) 和 (m, n) ,田地内部有一些水平栅栏和垂直栅栏,分别由数组 hFences 和 vFences 给出。 水平栅栏为坐标 (hFences[i], 1) 到 (hFences[i], n),垂直栅栏为坐标 (1, vFences[i]) 到 (m, vFences[i]) 。 返回通过 移除 一些栅栏(可能不移除)所能形成的最大面积的 正方形 田地的面积,或者如果无法形成正方形田地则返回 -1。 由于答案可能很大,所以请返回结果对…
leetcode.com 2026-01-16
🟡2975.maximum-square-area-by-removing-fences-from-a-field
🏷️ Tags
#array #hash_table #enumeration
🟡2975.maximum-square-area-by-removing-fences-from-a-field
🏷️ Tags
#array #hash_table #enumeration
Telegraph
maximum-square-area-by-removing-fences-from-a-field
There is a large (m - 1) x (n - 1) rectangular field with corners at (1, 1) and (m, n) containing some horizontal and vertical fences given in arrays hFences and vFences respectively. Horizontal fences are from the coordinates (hFences[i], 1) to (hFences[i]…
leetcode.cn 2026-01-17
🟡3047.find-the-largest-area-of-square-inside-two-rectangles
🏷️ Tags
#geometry #array #math
🟡3047.find-the-largest-area-of-square-inside-two-rectangles
🏷️ Tags
#geometry #array #math
Telegraph
find-the-largest-area-of-square-inside-two-rectangles
在二维平面上存在 n 个矩形。给你两个下标从 0 开始的二维整数数组 bottomLeft 和 topRight,两个数组的大小都是 n x 2 ,其中 bottomLeft[i] 和 topRight[i] 分别代表第 i 个矩形的 左下角 和 右上角 坐标。 我们定义 向右 的方向为 x 轴正半轴(x 坐标增加),向左 的方向为 x 轴负半轴(x 坐标减少)。同样地,定义 向上 的方向为 y 轴正半轴(y 坐标增加),向下 的方向为 y 轴负半轴(y 坐标减少)。 你可以选择一个区域,该区域由两个矩形的…
leetcode.com 2026-01-17
🟡3047.find-the-largest-area-of-square-inside-two-rectangles
🏷️ Tags
#geometry #array #math
🟡3047.find-the-largest-area-of-square-inside-two-rectangles
🏷️ Tags
#geometry #array #math
Telegraph
find-the-largest-area-of-square-inside-two-rectangles
There exist n rectangles in a 2D plane with edges parallel to the x and y axis. You are given two 2D integer arrays bottomLeft and topRight where bottomLeft[i] = [a_i, b_i] and topRight[i] = [c_i, d_i] represent the bottom-left and top-right coordinates of…