转载请注明出处： https://www.cnblogs.com/darkknightzh/p/10493114.html 1. 问题 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
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
java中的变量有两种：primitive主数据类型（比如int） 和 引用（引用对象的实例变量或者方法）。 Java注重类型，使用变量前要声明变量的类型（type）和名字（name）。 一、先理解下基础数据类型 1、存放数值的变量有6中类型： byte：8，（-128，127） short：16 （-32768，32767） int：32 （-2147483648，2147483647） long：6
