LeetCode 1091. Shortest Path in Binary Matrix二进制矩阵中的最短路径【Medium】【Python】【BFS】 Problem LeetCode 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, ...
二进制矩阵中的最短路径 Shortest Path In Binary Matrix 给定一个N*N矩阵grid,返回一个最短路径,如果没有就返回-1; 最短路径:从grid的左上角[0,0]开始,直到右下角[n-1,n-1],所有路径上的点必须是0, 路径可以是上下左右,还可以是左上左下,右上右下。 grid =[[0,1],[1,0]]out:2 思路 grid...
public int shortestPathBinaryMatrix(int[][] grid) { int n = grid.length - 1; Queue<Pair<Integer,Integer>> q = new ArrayDeque<Pair<Integer,Integer>>(); q.add(new Pair(0, 0)); if (grid[0][0] == 1 || grid[n][n] == 1) return -1; // grid[0][0]是出发点,所以必走 gr...
LeetCode 1091. Shortest Path in Binary Matrix二进制矩阵中的最短路径【Medium】【Python】【BFS】 Problem LeetCode 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, ...
def shortestPathBinaryMatrix(self, grid): m = len(grid) n = len(grid[0]) length = 0 success = 0 to_check1 = [[0,0]] to_check2 = [] while to_check1 and not success: length += 1 while to_check1: [x,y] = to_check1.pop(0) ...
1091. 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的问题。那圈的数值...
Today, we will practice on a popular algorithm question, which is questioned by many top companies in recent, it is to find shortest path in binary matrix.
63 articles (49%) did not report enough information on the calculation of centrality to allow their replication, six of which were unclear even whether edges were binary or weighted. Moreover, 61% of the studies using weighted edges may contain errors in how shortest path centralities are ...
The main contributions of this work are: 1) several deep neural architectures to predict the relative position of image fragments that out- perform the previous state of the art; 2) casting the reassembly problem into the shortest path in a graph problem for which we provide several...
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...