leetcode.com 2025-12-31
🔴1970.last-day-where-you-can-still-cross
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #array #binary_search #matrix
🔴1970.last-day-where-you-can-still-cross
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #array #binary_search #matrix
Telegraph
last-day-where-you-can-still-cross
There is a 1-based binary matrix where 0 represents land and 1 represents water. You are given integers row and col representing the number of rows and columns in the matrix, respectively. Initially on day 0, the entire matrix is land. However, each day a…
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 2026-01-19
🟡1292.maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
🏷️ Tags
#array #binary_search #matrix #prefix_sum
🟡1292.maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
🏷️ Tags
#array #binary_search #matrix #prefix_sum
Telegraph
maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
给你一个大小为 m x n 的矩阵 mat 和一个整数阈值 threshold。 请你返回元素总和小于或等于阈值的正方形区域的最大边长;如果没有这样的正方形区域,则返回 0 。 示例 1: 输入:mat = [[1,1,3,2,4,3,2],[1,1,3,2,4,3,2],[1,1,3,2,4,3,2]], threshold = 4 输出:2 解释:总和小于或等于 4 的正方形的最大边长为 2,如图所示。 示例 2: 输入:mat = [[2,2,2,2,2],[2,2,2,2,2],[2,2,2,2…
leetcode.com 2026-01-19
🟡1292.maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
🏷️ Tags
#array #binary_search #matrix #prefix_sum
🟡1292.maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
🏷️ Tags
#array #binary_search #matrix #prefix_sum
Telegraph
maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
Given a m x n matrix mat and an integer threshold, return the maximum side-length of a square with a sum less than or equal to threshold or return 0 if there is no such square. Example 1: Input: mat = [[1,1,3,2,4,3,2],[1,1,3,2,4,3,2],[1,1,3,2,4,3,2]], threshold…
leetcode.cn 2026-02-09
🟡1382.balance-a-binary-search-tree
🏷️ Tags
#greedy #tree #depth_first_search #binary_search_tree #divide_and_conquer #binary_tree
🟡1382.balance-a-binary-search-tree
🏷️ Tags
#greedy #tree #depth_first_search #binary_search_tree #divide_and_conquer #binary_tree
Telegraph
balance-a-binary-search-tree
给你一棵二叉搜索树,请你返回一棵 平衡后 的二叉搜索树,新生成的树应该与原来的树有着相同的节点值。如果有多种构造方法,请你返回任意一种。 如果一棵二叉搜索树中,每个节点的两棵子树高度差不超过 1 ,我们就称这棵二叉搜索树是 平衡的 。 示例 1: 输入:root = [1,null,2,null,3,null,4,null,null] 输出:[2,1,3,null,null,null,4] 解释:这不是唯一的正确答案,[3,1,4,null,2,null,null] 也是一个可行的构造方案。 示例 2:…