leetcode.cn 2026-07-01
🟡2812.find-the-safest-path-in-a-grid
🏷️ Tags
#breadth_first_search #union_find #array #binary_search #matrix #heap_priority_queue
🟡2812.find-the-safest-path-in-a-grid
🏷️ Tags
#breadth_first_search #union_find #array #binary_search #matrix #heap_priority_queue
Telegraph
find-the-safest-path-in-a-grid
给你一个下标从 0 开始、大小为 n x n 的二维矩阵 grid ,其中 (r, c) 表示:
leetcode.com 2026-07-01
🟡2812.find-the-safest-path-in-a-grid
🏷️ Tags
#breadth_first_search #union_find #array #binary_search #matrix #heap_priority_queue
🟡2812.find-the-safest-path-in-a-grid
🏷️ Tags
#breadth_first_search #union_find #array #binary_search #matrix #heap_priority_queue
Telegraph
find-the-safest-path-in-a-grid
You are given a 0-indexed 2D matrix grid of size n x n, where (r, c) represents:
leetcode.cn 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
给你一个 m x n 的二进制矩形 grid 和一个整数 health 表示你的健康值。 你开始于矩形的左上角 (0, 0) ,你的目标是矩形的右下角 (m - 1, n - 1) 。 你可以在矩形中往上下左右相邻格子移动,但前提是你的健康值始终是 正数 。 对于格子 (i, j) ,如果 grid[i][j] = 1 ,那么这个格子视为 不安全 的,会使你的健康值减少 1 。 如果你可以到达最终的格子,请你返回 true ,否则返回 false 。 注意 ,当你在最终格子的时候,你的健康值也必须为 正数 。…
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…