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            "title": "Minesweeper",
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            "content": "<p>Let&#39;s play the minesweeper game (<a href=\"https://en.wikipedia.org/wiki/Minesweeper_(video_game)\" target=\"_blank\">Wikipedia</a>, <a href=\"http://minesweeperonline.com\" target=\"_blank\">online game</a>)!</p>\n\n<p>You are given an <code>m x n</code> char matrix <code>board</code> representing the game board where:</p>\n\n<ul>\n\t<li><code>&#39;M&#39;</code> represents an unrevealed mine,</li>\n\t<li><code>&#39;E&#39;</code> represents an unrevealed empty square,</li>\n\t<li><code>&#39;B&#39;</code> represents a revealed blank square that has no adjacent mines (i.e., above, below, left, right, and all 4 diagonals),</li>\n\t<li>digit (<code>&#39;1&#39;</code> to <code>&#39;8&#39;</code>) represents how many mines are adjacent to this revealed square, and</li>\n\t<li><code>&#39;X&#39;</code> represents a revealed mine.</li>\n</ul>\n\n<p>You are also given an integer array <code>click</code> where <code>click = [click<sub>r</sub>, click<sub>c</sub>]</code> represents the next click position among all the unrevealed squares (<code>&#39;M&#39;</code> or <code>&#39;E&#39;</code>).</p>\n\n<p>Return <em>the board after revealing this position according to the following rules</em>:</p>\n\n<ol>\n\t<li>If a mine <code>&#39;M&#39;</code> is revealed, then the game is over. You should change it to <code>&#39;X&#39;</code>.</li>\n\t<li>If an empty square <code>&#39;E&#39;</code> with no adjacent mines is revealed, then change it to a revealed blank <code>&#39;B&#39;</code> and all of its adjacent unrevealed squares should be revealed recursively.</li>\n\t<li>If an empty square <code>&#39;E&#39;</code> with at least one adjacent mine is revealed, then change it to a digit (<code>&#39;1&#39;</code> to <code>&#39;8&#39;</code>) representing the number of adjacent mines.</li>\n\t<li>Return the board when no more squares will be revealed.</li>\n</ol>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n<img src=\"https://assets.leetcode.com/uploads/2018/10/12/minesweeper_example_1.png\" style=\"width: 500px; max-width: 400px; height: 269px;\" />\n<pre>\n<strong>Input:</strong> board = [[&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;],[&quot;E&quot;,&quot;E&quot;,&quot;M&quot;,&quot;E&quot;,&quot;E&quot;],[&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;],[&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;]], click = [3,0]\n<strong>Output:</strong> [[&quot;B&quot;,&quot;1&quot;,&quot;E&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;M&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;]]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n<img src=\"https://assets.leetcode.com/uploads/2018/10/12/minesweeper_example_2.png\" style=\"width: 500px; max-width: 400px; height: 275px;\" />\n<pre>\n<strong>Input:</strong> board = [[&quot;B&quot;,&quot;1&quot;,&quot;E&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;M&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;]], click = [1,2]\n<strong>Output:</strong> [[&quot;B&quot;,&quot;1&quot;,&quot;E&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;X&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;]]\n</pre>\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;= 50</code></li>\n\t<li><code>board[i][j]</code> is either <code>&#39;M&#39;</code>, <code>&#39;E&#39;</code>, <code>&#39;B&#39;</code>, or a digit from <code>&#39;1&#39;</code> to <code>&#39;8&#39;</code>.</li>\n\t<li><code>click.length == 2</code></li>\n\t<li><code>0 &lt;= click<sub>r</sub> &lt; m</code></li>\n\t<li><code>0 &lt;= click<sub>c</sub> &lt; n</code></li>\n\t<li><code>board[click<sub>r</sub>][click<sub>c</sub>]</code> is either <code>&#39;M&#39;</code> or <code>&#39;E&#39;</code>.</li>\n</ul>\n",
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                    "code": "/**\n * @param {character[][]} board\n * @param {number[]} click\n * @return {character[][]}\n */\nvar updateBoard = function(board, click) {\n    \n};",
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