leetcode-problemset/leetcode-cn/originData/surrounded-regions.json

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            "categoryTitle": "Algorithms",
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            "title": "Surrounded Regions",
            "titleSlug": "surrounded-regions",
            "content": "<p>You are given an <code>m x n</code> matrix <code>board</code> containing <strong>letters</strong> <code>&#39;X&#39;</code> and <code>&#39;O&#39;</code>, <strong>capture regions</strong> that are <strong>surrounded</strong>:</p>\n\n<ul>\n\t<li><strong>Connect</strong>: A cell is connected to adjacent cells horizontally or vertically.</li>\n\t<li><strong>Region</strong>: To form a region <strong>connect every</strong> <code>&#39;O&#39;</code> cell.</li>\n\t<li><strong>Surround</strong>: The region is surrounded with <code>&#39;X&#39;</code> cells if you can <strong>connect the region </strong>with <code>&#39;X&#39;</code> cells and none of the region cells are on the edge of the <code>board</code>.</li>\n</ul>\n\n<p>To capture a <strong>surrounded region</strong>, replace all <code>&#39;O&#39;</code>s with <code>&#39;X&#39;</code>s <strong>in-place</strong> within the original board. You do not need to return anything.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">board = [[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;X&quot;,&quot;X&quot;]]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">[[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;X&quot;,&quot;X&quot;]]</span></p>\n\n<p><strong>Explanation:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/02/19/xogrid.jpg\" style=\"width: 367px; height: 158px;\" />\n<p>In the above diagram, the bottom region is not captured because it is on the edge of the board and cannot be surrounded.</p>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">board = [[&quot;X&quot;]]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">[[&quot;X&quot;]]</span></p>\n</div>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</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 &lt;= m, n &lt;= 200</code></li>\n\t<li><code>board[i][j]</code> is <code>&#39;X&#39;</code> or <code>&#39;O&#39;</code>.</li>\n</ul>\n",
            "translatedTitle": "被围绕的区域",
            "translatedContent": "<p>给你一个 <code>m x n</code> 的矩阵 <code>board</code> ，由若干字符 <code>'X'</code> 和 <code>'O'</code>&nbsp;组成，<strong>捕获</strong> 所有 <strong>被围绕的区域</strong>：</p>\n\n<ul>\n\t<li><strong>连接：</strong>一个单元格与水平或垂直方向上相邻的单元格连接。</li>\n\t<li><strong>区域：连接所有&nbsp;</strong><code>'O'</code>&nbsp;的单元格来形成一个区域。</li>\n\t<li><strong>围绕：</strong>如果您可以用&nbsp;<code>'X'</code>&nbsp;单元格 <strong>连接这个区域</strong>，并且区域中没有任何单元格位于&nbsp;<code>board</code> 边缘，则该区域被 <code>'X'</code>&nbsp;单元格围绕。</li>\n</ul>\n\n<p>通过 <strong>原地</strong>&nbsp;将输入矩阵中的所有 <code>'O'</code>&nbsp;替换为 <code>'X'</code> 来 <strong>捕获被围绕的区域</strong>。你不需要返回任何值。</p>\n\n<div class=\"original__bRMd\">\n<div>\n<p>&nbsp;</p>\n\n<p><strong class=\"example\">示例 1：</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入：</strong><span class=\"example-io\">board = [[\"X\",\"X\",\"X\",\"X\"],[\"X\",\"O\",\"O\",\"X\"],[\"X\",\"X\",\"O\",\"X\"],[\"X\",\"O\",\"X\",\"X\"]]</span></p>\n\n<p><b>输出：</b><span class=\"example-io\">[[\"X\",\"X\",\"X\",\"X\"],[\"X\",\"X\",\"X\",\"X\"],[\"X\",\"X\",\"X\",\"X\"],[\"X\",\"O\",\"X\",\"X\"]]</span></p>\n\n<p><strong>解释：</strong></p>\n<img alt=\"\" src=\"https://pic.leetcode.cn/1718167191-XNjUTG-image.png\" style=\"width: 367px; height: 158px;\" />\n<p>在上图中，底部的区域没有被捕获，因为它在 board 的边缘并且不能被围绕。</p>\n</div>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入：</strong><span class=\"example-io\">board = [[\"X\"]]</span></p>\n\n<p><strong>输出：</strong><span class=\"example-io\">[[\"X\"]]</span></p>\n</div>\n\n<p>&nbsp;</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 &lt;= m, n &lt;= 200</code></li>\n\t<li><code>board[i][j]</code> 为 <code>'X'</code> 或 <code>'O'</code></li>\n</ul>\n</div>\n</div>\n",
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