dfs或者bfs class Solution: def dfs(self, A, rows, cols, i, j): if not (0 <= i < rows and 0 <= j < cols): return elif A[i][j] == 0: return else: A[i][j] = 0 self.dfs(A, rows, cols, i + 1, j) self.dfs(A, rows, cols, i - 1, j) self.dfs(A, rows, col…

题目如下: Given a 2D array A, each cell is 0 (representing sea) or 1 (representing land) A move consists of walking from one land square 4-directionally to another land square, or off the boundary of the grid. Return the number of land squares in the gri…

Leetcode之深度优先搜索(DFS)专题-1020. 飞地的数量(Number of Enclaves) 深度优先搜索的解题详细介绍,点击 给出一个二维数组 A,每个单元格为 0(代表海)或 1(代表陆地). 移动是指在陆地上从一个地方走到另一个地方(朝四个方向之一)或离开网格的边界. 返回网格中无法在任意次数的移动中离开网格边界的陆地单元格的数量. 示例 1: 输入:[[0,0,0,0],[1,0,1,0],[0,1,1,0],[0,0,0,0]] 输出:3 解释: 有三个 1 被 0 包…

版权声明: 本文为博主Bravo Yeung(知乎UserName同名)的原创文章,欲转载请先私信获博主允许,转载时请附上网址 http://blog.csdn.net/lzuacm. C#版 - Leetcode 191. Number of 1 Bits题解 191. 位1的个数 在线提交: https://leetcode-cn.com/problems/number-of-1-bits/description/ 题目描述 编写一个函数,输入是一个无符号整数,返回其二进制表达式中数字位数为…

Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by…

Given a non-empty 2D array grid of 0's and 1's, an island is a group of 1's (representing land) connected 4-directionally (horizontal or vertical.) You may assume all four edges of the grid are surrounded by water. Count the number of distinct island…

Given a non-empty 2D array grid of 0's and 1's, an island is a group of 1's (representing land) connected 4-directionally (horizontal or vertical.) You may assume all four edges of the grid are surrounded by water. Count the number of distinct island…

Given a non-empty 2D array grid of 0's and 1's, an island is a group of 1's (representing land) connected 4-directionally (horizontal or vertical.) You may assume all four edges of the grid are surrounded by water. Count the number of distinct island…

Leetcode ugly number set (3 now) new ugly number is generated by multiplying a prime with previous generated ugly numbe Is ugly number or not class Solution { public boolean isUgly(int num) { if(num==0) return false; //how to generate the number whil…

Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by…