class Solution { 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...
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...
1091. Shortest Path in Binary Matrix刷题笔记 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 = ...
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 1. 2....
1classSolution {2public:3vector<vector<int>> dir={{-1,-1},{-1,0},{-1,1},{0,-1},{0,1},{1,-1},{1,0},{1,1}};4intshortestPathBinaryMatrix(vector<vector<int>>&grid) {5intn =grid.size();6intstep =0;7queue<pair<int,int>>q;8if(grid[0][0]==0&& grid[n-1][n-...
Given ann x nbinary matrixgrid, returnthe length of the shortestclear pathin the matrix. If there is no clear path, return-1. Aclear pathin a binary matrix is a path from thetop-leftcell (i.e.,(0, 0)) to thebottom-rightcell (i.e.,(n - 1, n - 1)) such that: ...
Example 2: Input:[[0,0,0],[1,1,0],[1,1,0]]Output:4 Note: 1 <= grid.length == grid[0].length <= 100 grid[i][j]is0or1 思路:BFS classSolution(object): defshortestPathBinaryMatrix(self, grid): """ :type grid: List[List[int]] ...
Shortest Distance in a Line Write a query to find the shortest distance between two points in these points. | x | |---| | -1...| | 0 | | 2 | The shortest distance is '1' obviously, which is from point '-1' to '0'...So the output is as below: | shortest| |---| |...
The average shortest distance in this network is 1.8 (the mean of the matrix, diagonal excluded).Difficulty occurs when ties are differentiated, as they are in a weighted network. For example, the tie between node A and B has twice the strength of the tie between node A and node C. ...
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 from the top-left cell (i.e., (0, 0)) to the bottom-right cell (i.e., (n - 1, n - 1)...