class Solution { public: void full_dire(int x, int y, queue<pair<int, int>> &path, vector<vector<int>>& grid){ if(x > 0 && y > 0 && grid[x - 1][y - 1] == 0){ grid[x - 1][y - 1] = grid[x][y] + 1; path.push({x - 1, y - 1}); } if(y > 0 && ...
#include <iostream> #include <vector> #include <queue> using namespace std; int shortestPathBinaryMatrix(vector<vector<int>>& grid) { int n = grid.size(); if (grid[0][0] == 1 || grid[n-1][n-1] == 1) return -1; vector<vector&...
grid = [[0,1],[1,0]] print(Solution().shortestPathBinaryMatrix(grid)) grid = [[0,0,0],[1,1,0],[1,1,0]] print(Solution().shortestPathBinaryMatrix(grid)) grid = [[1,0,0],[1,1,0],[1,1,0]] print(Solution().shortestPathBinaryMatrix(grid)) 1. 2. 3. 4. 5. 6. 7...
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...
1091. Shortest Path in Binary Matrix 问题: 给定n*n二维数组,要从(0,0)->(n-1,n-1) 0:通路 1:障碍 求最少多少步能到达。 可以走当前格子的8个方向。 Example 1: Input: grid = [[0,1],[1,0]] Output: 2 Example 2: Input: grid = [[0,0,0],[1,1,0],[1,1,0]]...
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}); ...
class Solution { public: int shortestPathBinaryMatrix(vector<vector<int>>& grid) { if (grid.empty() == true) { return -1; } int n = grid.size(), m = grid[0].size(); if (grid[0][0] == 1 || grid[n - 1][m - 1] == 1) { return -1; } queue<pair<int, int>> ...
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...
Python调用Gurobi:Shortest Path Problem及其对偶问题的一些探讨 最短路问题(Shortest Path Problem, SPP)是一类非常经典的问题。基本的SPP不是NP-hard,可以用Dijkstra等算法在多项式时间内求解到最优解。今天我们不探讨这些求解算法,仅探讨用求解器Gurobi和Python来求解这个问题。 我们首先来看一个例子网络: SPP:有负环...
Given amazein the form of a binary rectangular matrix, find the shortest path’s length in the maze from a given source to a given destination. The path can only be constructed out of cells having value 1, and at any moment, we can only move one step in one of the four directions....