[LeetCode] Number of Islands
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 ...
原文：Leetcode: Number of Islands
DFS的Flood Fill方法， 不使用额外visited数组，但是用 变成 表示visited的方法 复杂度 时间 O NM 空间 O max N,M 递归栈空间 Union Find: Quick Union follow up是找最大岛的面积，想法是设置两个全局变量 maxArea, area, area负责记录每个岛的面积，上面代码第 行每次遇到 就置为 ，然后在recursion里面 ...
2015-04-11 05:20 0 1999 推荐指数：
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