参考: https://leetcode.com/problems/shortest-path-in-binary-matrix/discuss/312827/Python-Concise-BFS
Given ann x nbinary matrixgrid, returnthe length of the shortest clear path in the matrix. If there is no clear path, return-1. A clear path in a binary matrix is a path from the top-left cell (i.e.,(0, 0)) to the bottom-right cell (i.e.,(n - 1, n - 1)) such that...
Can you solve this real interview question? Shortest Path in Binary Matrix - Given an n x n binary matrix grid, return the length of the shortest clear path in the matrix. If there is no clear path, return -1. A clear path in a binary matrix is a path f
问题描述很显然是一种最短路问题,可以用广度优先来做(可以理解为大水漫灌) LeetCode代码: class Solution: def shortestPathBinaryMatrix(self, grid: List[List[int]]) -> int: m = len(grid) n = len(grid[0]) length = 0 success = 0 to_check1 = [[0,0]] to_check2 = [] while to_check...
Shortest Path in Binary Matrix queue.append((i+1, j+1, count)) return -1 Reference https://leetcode.com/problems/shortest-path-in-binary-matrix 30510 Shortest Unsorted Continuous Subarray } } return end - start + 1; } }; Reference https://leetcode.com/problems/shortest-unsorted-continuous...
1091. Shortest Path in Binary Matrix # 题目# In an N by N square grid, each cell is either empty (0) or blocked (1). A clear path from top-left to bottom-right has length k if and only if it is composed of cells C_1, C_2, ..., C_k such that: Adjacent cells C_i and...
技术标签: Leetcode1091. Shortest Path in Binary Matrix 题目传送门分析乍一看好像是路径搜索,仔细一看还是路径搜索,实际就是路径搜索。代码实现上我用的是BFS,也可以用DFS,但是我觉得DFS效率上不如BFS,所以就没用。 其中关于路径边缘检测这部分,可以使用在原有矩阵基础上加一圈的操作来避免每次都要判断是否越界...
LeetCode-1091. Shortest Path in Binary Matrix In an N by N square grid, each cell is either empty (0) or blocked (1). A clear path from top-left to bottom-right has length k if and only if it is composed of cells C_1, C_2, ..., C_k such that: Adjacent cells C_i and...
classSolution{public:intshortestPathBinaryMatrix(vector<vector<int>>& grid){if(grid[0][0] ==1)return-1;intres =0, n = grid.size(); set<vector<int>> visited; visited.insert({0,0}); queue<vector<int>> q; q.push({0,0}); ...
【leetcode】1091. Shortest Path in Binary Matrix 题目如下: In an N by N square grid, each cell is either empty (0) or blocked (1). Aclear path from top-left to bottom-righthas lengthkif and only if it is composed of cellsC_1, C_2, ..., C_ksuch that:...