leetcode.com 2026-07-02
🟡3286.find-a-safe-walk-through-a-grid
🏷️ Tags
#breadth_first_search #graph #array #matrix #shortest_path #heap_priority_queue
🟡3286.find-a-safe-walk-through-a-grid
🏷️ Tags
#breadth_first_search #graph #array #matrix #shortest_path #heap_priority_queue
Telegraph
find-a-safe-walk-through-a-grid
You are given an m x n binary matrix grid and an integer health. You start on the upper-left corner (0, 0) and would like to get to the lower-right corner (m - 1, n - 1). You can move up, down, left, or right from one cell to another adjacent cell as long…
leetcode.cn 2026-07-03
🔴3620.network-recovery-pathways
🏷️ Tags
#graph #topological_sort #array #binary_search #dynamic_programming #shortest_path #heap_priority_queue
🔴3620.network-recovery-pathways
🏷️ Tags
#graph #topological_sort #array #binary_search #dynamic_programming #shortest_path #heap_priority_queue
Telegraph
network-recovery-pathways
给你一个包含 n 个节点(编号从 0 到 n - 1)的有向无环图。图由长度为 m 的二维数组 edges 表示,其中 edges[i] = [ui, vi, costi] 表示从节点 ui 到节点 vi 的单向通信,恢复成本为 costi。 一些节点可能处于离线状态。给定一个布尔数组 online,其中 online[i] = true 表示节点 i 在线。节点 0 和 n - 1 始终在线。 从 0 到 n - 1 的路径如果满足以下条件,那么它是 有效 的:
leetcode.com 2026-07-03
🔴3620.network-recovery-pathways
🏷️ Tags
#graph #topological_sort #array #binary_search #dynamic_programming #shortest_path #heap_priority_queue
🔴3620.network-recovery-pathways
🏷️ Tags
#graph #topological_sort #array #binary_search #dynamic_programming #shortest_path #heap_priority_queue
Telegraph
network-recovery-pathways
You are given a directed acyclic graph of n nodes numbered from 0 to n − 1. This is represented by a 2D array edges of length m, where edges[i] = [ui, vi, costi] indicates a one‑way communication from node ui to node vi with a recovery cost of costi. Some…
leetcode.cn 2026-07-04
🟡2492.minimum-score-of-a-path-between-two-cities
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #graph
🟡2492.minimum-score-of-a-path-between-two-cities
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #graph
Telegraph
minimum-score-of-a-path-between-two-cities
给你一个正整数 n ,表示总共有 n 个城市,城市从 1 到 n 编号。给你一个二维数组 roads ,其中 roads[i] = [ai, bi, distancei] 表示城市 ai 和 bi 之间有一条 双向 道路,道路距离为 distancei 。城市构成的图不一定是连通的。 两个城市之间一条路径的 分数 定义为这条路径中道路的 最小 距离。 返回城市 1 和城市 n 之间的所有路径的 最小 分数。 注意:
leetcode.com 2026-07-04
🟡2492.minimum-score-of-a-path-between-two-cities
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #graph
🟡2492.minimum-score-of-a-path-between-two-cities
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #graph
Telegraph
minimum-score-of-a-path-between-two-cities
You are given a positive integer n representing n cities numbered from 1 to n. You are also given a 2D array roads where roads[i] = [ai, bi, distancei] indicates that there is a bidirectional road between cities ai and bi with a distance equal to distancei.…
leetcode.cn 2026-07-05
🔴1301.number-of-paths-with-max-score
🏷️ Tags
#array #dynamic_programming #matrix
🔴1301.number-of-paths-with-max-score
🏷️ Tags
#array #dynamic_programming #matrix
Telegraph
number-of-paths-with-max-score
给你一个正方形字符数组 board ,你从数组最右下方的字符 'S' 出发。 你的目标是到达数组最左上角的字符 'E' ,数组剩余的部分为数字字符 1, 2, ..., 9 或者障碍 'X'。在每一步移动中,你可以向上、向左或者左上方移动,可以移动的前提是到达的格子没有障碍。 一条路径的 「得分」 定义为:路径上所有数字的和。 请你返回一个列表,包含两个整数:第一个整数是 「得分」 的最大值,第二个整数是得到最大得分的方案数,请把结果对 10^9 + 7 取余。 如果没有任何路径可以到达终点,请返回 [0…
leetcode.com 2026-07-05
🔴1301.number-of-paths-with-max-score
🏷️ Tags
#array #dynamic_programming #matrix
🔴1301.number-of-paths-with-max-score
🏷️ Tags
#array #dynamic_programming #matrix
Telegraph
number-of-paths-with-max-score
You are given a square board of characters. You can move on the board starting at the bottom right square marked with the character 'S'. You need to reach the top left square marked with the character 'E'. The rest of the squares are labeled either with a…
leetcode.cn 2026-07-08
🟡3756.concatenate-non-zero-digits-and-multiply-by-sum-ii
🏷️ Tags
#math #string #prefix_sum
🟡3756.concatenate-non-zero-digits-and-multiply-by-sum-ii
🏷️ Tags
#math #string #prefix_sum
Telegraph
concatenate-non-zero-digits-and-multiply-by-sum-ii
给你一个长度为 m 的字符串 s,其中仅包含数字。另给你一个二维整数数组 queries,其中 queries[i] = [li, ri]。
leetcode.com 2026-07-08
🟡3756.concatenate-non-zero-digits-and-multiply-by-sum-ii
🏷️ Tags
#math #string #prefix_sum
🟡3756.concatenate-non-zero-digits-and-multiply-by-sum-ii
🏷️ Tags
#math #string #prefix_sum
Telegraph
concatenate-non-zero-digits-and-multiply-by-sum-ii
You are given a string s of length m consisting of digits. You are also given a 2D integer array queries, where queries[i] = [li, ri]. For each queries[i], extract the substring s[li..ri]. Then, perform the following:
leetcode.cn 2026-07-09
🟡3532.path-existence-queries-in-a-graph-i
🏷️ Tags
#union_find #graph #array #hash_table #binary_search
🟡3532.path-existence-queries-in-a-graph-i
🏷️ Tags
#union_find #graph #array #hash_table #binary_search
Telegraph
path-existence-queries-in-a-graph-i
给你一个整数 n,表示图中的节点数量,这些节点按从 0 到 n - 1 编号。 同时给你一个长度为 n 的整数数组 nums,该数组按 非递减 顺序排序,以及一个整数 maxDiff。 如果满足 |nums[i] - nums[j]| <= maxDiff(即 nums[i] 和 nums[j] 的 绝对差 至多为 maxDiff),则节点 i 和节点 j 之间存在一条 无向边 。 此外,给你一个二维整数数组 queries。对于每个 queries[i] = [ui, vi],需要判断节点 ui 和 vi…
leetcode.com 2026-07-09
🟡3532.path-existence-queries-in-a-graph-i
🏷️ Tags
#union_find #graph #array #hash_table #binary_search
🟡3532.path-existence-queries-in-a-graph-i
🏷️ Tags
#union_find #graph #array #hash_table #binary_search
Telegraph
path-existence-queries-in-a-graph-i
You are given an integer n representing the number of nodes in a graph, labeled from 0 to n - 1. You are also given an integer array nums of length n sorted in non-decreasing order, and an integer maxDiff. An undirected edge exists between nodes i and j if…
leetcode.cn 2026-07-10
🔴3534.path-existence-queries-in-a-graph-ii
🏷️ Tags
#greedy #bit_manipulation #graph #array #two_pointers #binary_search #dynamic_programming #sorting
🔴3534.path-existence-queries-in-a-graph-ii
🏷️ Tags
#greedy #bit_manipulation #graph #array #two_pointers #binary_search #dynamic_programming #sorting
Telegraph
path-existence-queries-in-a-graph-ii
给你一个整数 n,表示图中的节点数量,这些节点按从 0 到 n - 1 编号。 同时给你一个长度为 n 的整数数组 nums,以及一个整数 maxDiff。 如果满足 |nums[i] - nums[j]| <= maxDiff(即 nums[i] 和 nums[j] 的 绝对差 至多为 maxDiff),则节点 i 和节点 j 之间存在一条 无向边 。 此外,给你一个二维整数数组 queries。对于每个 queries[i] = [ui, vi],找到节点 ui 和节点 vi 之间的 最短距离 。如果两节点之间不存在路径,则返回…
leetcode.com 2026-07-10
🔴3534.path-existence-queries-in-a-graph-ii
🏷️ Tags
#greedy #bit_manipulation #graph #array #two_pointers #binary_search #dynamic_programming #sorting
🔴3534.path-existence-queries-in-a-graph-ii
🏷️ Tags
#greedy #bit_manipulation #graph #array #two_pointers #binary_search #dynamic_programming #sorting
Telegraph
path-existence-queries-in-a-graph-ii
You are given an integer n representing the number of nodes in a graph, labeled from 0 to n - 1. You are also given an integer array nums of length n and an integer maxDiff. An undirected edge exists between nodes i and j if the absolute difference between…
leetcode.cn 2026-07-11
🟡2685.count-the-number-of-complete-components
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #graph
🟡2685.count-the-number-of-complete-components
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #graph
Telegraph
count-the-number-of-complete-components
给你一个整数 n 。现有一个包含 n 个顶点的 无向 图,顶点按从 0 到 n - 1 编号。给你一个二维整数数组 edges 其中 edges[i] = [ai, bi] 表示顶点 ai 和 bi 之间存在一条 无向 边。 返回图中 完全连通分量 的数量。 如果在子图中任意两个顶点之间都存在路径,并且子图中没有任何一个顶点与子图外部的顶点共享边,则称其为 连通分量 。 如果连通分量中每对节点之间都存在一条边,则称其为 完全连通分量 。 示例 1: 输入:n = 6, edges = [[0,1],[0…
leetcode.com 2026-07-11
🟡2685.count-the-number-of-complete-components
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #graph
🟡2685.count-the-number-of-complete-components
🏷️ Tags
#depth_first_search #breadth_first_search #union_find #graph
Telegraph
count-the-number-of-complete-components
You are given an integer n. There is an undirected graph with n vertices, numbered from 0 to n - 1. You are given a 2D integer array edges where edges[i] = [ai, bi] denotes that there exists an undirected edge connecting vertices ai and bi. Return the number…