力扣leetcode.cn/problems/shortest-path-in-a-hidden-grid/ 由于题目中的地图一开始是未知的,那么就必须想办法将整个地图探开,才有最短路径这一说。 不妨设机器人一开始位于坐标(0, 0),然后向四个方向dfs,将经过的所有坐标都记录下来。同时在dfs过程中利用isTarget判断dfs过程中是否到达过目标位置,若到达过...
Can you solve this real interview question? Shortest Path in a Grid with Obstacles Elimination - You are given an m x n integer matrix grid where each cell is either 0 (empty) or 1 (obstacle). You can move up, down, left, or right from and to an empty ce
LeetCode 1810. Minimum Path Cost in a Hidden GridCode: https://github.com/gzc/leetcode/blob/master/cpp/1001-10000/1801-1810/Minimum%20Path%20Cost%20in%20a%20Hidden%20Grid.cpp
Explanation: The shortest path without eliminating any obstacle is 10. The shortest path with one obstacle elimination at position (3,2) is 6. Such path is (0,0) -> (0,1) -> (0,2) -> (1,2) -> (2,2) -> (3,2) -> (4,2). Example 2: Input: grid = [[0,1,1], [1...
grid[0][0] == grid[m-1][n-1] == 0 题解: Use BFS to track the shortest path. In queue, we need coordinate and current count of obstacles eliminated. For the polled coordinate, if it is the lower right corner, then return the BFS level as step. ...
输入:grid = [[0,1,1],[1,1,1],[1,0,0]], k = 1 输出:-1 解释:我们至少需要消除两个障碍才能找到这样的路径。 提示:grid.length == m grid[0].length == n 1 <= m, n <= 40 1 <= k <= m*n grid[i][j] 是0 或 1 grid[0][0] == grid[m-1][n-1] == 0...
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