From c3d57a5143b51145a3179dacdc8c432c34b4516b Mon Sep 17 00:00:00 2001
From: "huangge1199@hotmail.com" <huangge1199>
Date: Mon, 12 Jul 2021 23:40:49 +0800
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 .../leetcode/editor/cn/MaxAreaOfIsland.java   | 75 +++++++++++++++++++
 .../leetcode/editor/cn/MaxAreaOfIsland.md     | 32 ++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 src/main/java/leetcode/editor/cn/MaxAreaOfIsland.java
 create mode 100644 src/main/java/leetcode/editor/cn/MaxAreaOfIsland.md

diff --git a/src/main/java/leetcode/editor/cn/MaxAreaOfIsland.java b/src/main/java/leetcode/editor/cn/MaxAreaOfIsland.java
new file mode 100644
index 0000000..e0dc7d0
--- /dev/null
+++ b/src/main/java/leetcode/editor/cn/MaxAreaOfIsland.java
@@ -0,0 +1,75 @@
+//给定一个包含了一些 0 和 1 的非空二维数组 grid 。 
+//
+// 一个 岛屿 是由一些相邻的 1 (代表土地) 构成的组合，这里的「相邻」要求两个 1 必须在水平或者竖直方向上相邻。你可以假设 grid 的四个边缘都被 
+//0（代表水）包围着。 
+//
+// 找到给定的二维数组中最大的岛屿面积。(如果没有岛屿，则返回面积为 0 。) 
+//
+// 
+//
+// 示例 1: 
+//
+// [[0,0,1,0,0,0,0,1,0,0,0,0,0],
+// [0,0,0,0,0,0,0,1,1,1,0,0,0],
+// [0,1,1,0,1,0,0,0,0,0,0,0,0],
+// [0,1,0,0,1,1,0,0,1,0,1,0,0],
+// [0,1,0,0,1,1,0,0,1,1,1,0,0],
+// [0,0,0,0,0,0,0,0,0,0,1,0,0],
+// [0,0,0,0,0,0,0,1,1,1,0,0,0],
+// [0,0,0,0,0,0,0,1,1,0,0,0,0]]
+// 
+//
+// 对于上面这个给定矩阵应返回 6。注意答案不应该是 11 ，因为岛屿只能包含水平或垂直的四个方向的 1 。 
+//
+// 示例 2: 
+//
+// [[0,0,0,0,0,0,0,0]] 
+//
+// 对于上面这个给定的矩阵, 返回 0。 
+//
+// 
+//
+// 注意: 给定的矩阵grid 的长度和宽度都不超过 50。 
+// Related Topics 深度优先搜索 广度优先搜索 并查集 数组 矩阵 
+// 👍 505 👎 0
+
+package leetcode.editor.cn;
+
+//695:岛屿的最大面积
+class MaxAreaOfIsland {
+    public static void main(String[] args) {
+        //测试代码
+        Solution solution = new MaxAreaOfIsland().new Solution();
+    }
+
+    //力扣代码
+    //leetcode submit region begin(Prohibit modification and deletion)
+    class Solution {
+        public int maxAreaOfIsland(int[][] grid) {
+            int max = 0;
+            for (int i = 0; i < grid.length; i++) {
+                for (int j = 0; j < grid[0].length; j++) {
+                    if (grid[i][j] == 1) {
+                        max = Math.max(max, dfs(grid, i, j));
+                    }
+                }
+            }
+            return max;
+        }
+
+        private int dfs(int[][] grid, int x, int y) {
+            if (x < 0 || x >= grid.length || y < 0 || y >= grid[0].length || grid[x][y] == 0) {
+                return 0;
+            }
+            grid[x][y]=0;
+            int count = 1;
+            count += dfs(grid, x - 1, y);
+            count += dfs(grid, x + 1, y);
+            count += dfs(grid, x, y - 1);
+            count += dfs(grid, x, y + 1);
+            return count;
+        }
+    }
+//leetcode submit region end(Prohibit modification and deletion)
+
+}
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diff --git a/src/main/java/leetcode/editor/cn/MaxAreaOfIsland.md b/src/main/java/leetcode/editor/cn/MaxAreaOfIsland.md
new file mode 100644
index 0000000..e361780
--- /dev/null
+++ b/src/main/java/leetcode/editor/cn/MaxAreaOfIsland.md
@@ -0,0 +1,32 @@
+<p>给定一个包含了一些 <code>0</code> 和 <code>1</code> 的非空二维数组&nbsp;<code>grid</code> 。</p>
+
+<p>一个&nbsp;<strong>岛屿</strong>&nbsp;是由一些相邻的&nbsp;<code>1</code>&nbsp;(代表土地) 构成的组合，这里的「相邻」要求两个 <code>1</code> 必须在水平或者竖直方向上相邻。你可以假设&nbsp;<code>grid</code> 的四个边缘都被 <code>0</code>（代表水）包围着。</p>
+
+<p>找到给定的二维数组中最大的岛屿面积。(如果没有岛屿，则返回面积为 <code>0</code> 。)</p>
+
+<p>&nbsp;</p>
+
+<p><strong>示例 1:</strong></p>
+
+<pre>[[0,0,1,0,0,0,0,1,0,0,0,0,0],
+ [0,0,0,0,0,0,0,1,1,1,0,0,0],
+ [0,1,1,0,1,0,0,0,0,0,0,0,0],
+ [0,1,0,0,1,1,0,0,<strong>1</strong>,0,<strong>1</strong>,0,0],
+ [0,1,0,0,1,1,0,0,<strong>1</strong>,<strong>1</strong>,<strong>1</strong>,0,0],
+ [0,0,0,0,0,0,0,0,0,0,<strong>1</strong>,0,0],
+ [0,0,0,0,0,0,0,1,1,1,0,0,0],
+ [0,0,0,0,0,0,0,1,1,0,0,0,0]]
+</pre>
+
+<p>对于上面这个给定矩阵应返回&nbsp;<code>6</code>。注意答案不应该是 <code>11</code> ，因为岛屿只能包含水平或垂直的四个方向的 <code>1</code> 。</p>
+
+<p><strong>示例 2:</strong></p>
+
+<pre>[[0,0,0,0,0,0,0,0]]</pre>
+
+<p>对于上面这个给定的矩阵, 返回&nbsp;<code>0</code>。</p>
+
+<p>&nbsp;</p>
+
+<p><strong>注意:&nbsp;</strong>给定的矩阵<code>grid</code>&nbsp;的长度和宽度都不超过 50。</p>
+<div><div>Related Topics</div><div><li>深度优先搜索</li><li>广度优先搜索</li><li>并查集</li><li>数组</li><li>矩阵</li></div></div>\n<div><li>👍 505</li><li>👎 0</li></div>
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