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"translatedContent": "<p>给你一个大小为 <code>m x n</code> 的矩阵 <code>board</code> 表示甲板,其中,每个单元格可以是一艘战舰 <code>'X'</code> 或者是一个空位 <code>'.'</code> ,返回在甲板 <code>board</code> 上放置的 <strong>战舰</strong> 的数量。</p>\n\n<p><strong>战舰</strong> 只能水平或者垂直放置在 <code>board</code> 上。换句话说,战舰只能按 <code>1 x k</code>(<code>1</code> 行,<code>k</code> 列)或 <code>k x 1</code>(<code>k</code> 行,<code>1</code> 列)的形状建造,其中 <code>k</code> 可以是任意大小。两艘战舰之间至少有一个水平或垂直的空位分隔 (即没有相邻的战舰)。</p>\n\n<p> </p>\n\n<p><strong>示例 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/04/10/battelship-grid.jpg\" style=\"width: 333px; height: 333px;\" />\n<pre>\n<strong>输入:</strong>board = [[\"X\",\".\",\".\",\"X\"],[\".\",\".\",\".\",\"X\"],[\".\",\".\",\".\",\"X\"]]\n<strong>输出:</strong>2\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<strong>输入:</strong>board = [[\".\"]]\n<strong>输出:</strong>0\n</pre>\n\n<p> </p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>m == board.length</code></li>\n\t<li><code>n == board[i].length</code></li>\n\t<li><code>1 <= m, n <= 200</code></li>\n\t<li><code>board[i][j]</code> 是 <code>'.'</code> 或 <code>'X'</code></li>\n</ul>\n\n<p> </p>\n\n<p><strong>进阶:</strong>你可以实现一次扫描算法,并只使用<strong> </strong><code>O(1)</code><strong> </strong>额外空间,并且不修改 <code>board</code> 的值来解决这个问题吗?</p>\n",
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