[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， 不使用額外visited數組，但是用 變成 表示visited的方法 復雜度 時間 O NM 空間 O max N,M 遞歸棧空間 Union Find: Quick Union follow up是找最大島的面積，想法是設置兩個全局變量 maxArea, area, area負責記錄每個島的面積，上面代碼第 行每次遇到 就置為 ，然后在recursion里面 ...
2015-04-11 05:20 0 1999 推薦指數：
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