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            "title": "Minimum Number of Days to Disconnect Island",
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            "content": "<p>You are given an <code>m x n</code> binary grid <code>grid</code> where <code>1</code> represents land and <code>0</code> represents water. An <strong>island</strong> is a maximal <strong>4-directionally</strong> (horizontal or vertical) connected group of <code>1</code>&#39;s.</p>\n\n<p>The grid is said to be <strong>connected</strong> if we have <strong>exactly one island</strong>, otherwise is said <strong>disconnected</strong>.</p>\n\n<p>In one day, we are allowed to change <strong>any </strong>single land cell <code>(1)</code> into a water cell <code>(0)</code>.</p>\n\n<p>Return <em>the minimum number of days to disconnect the grid</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/12/24/land1.jpg\" style=\"width: 500px; height: 169px;\" />\n<pre>\n<strong>Input:</strong> grid = [[0,1,1,0],[0,1,1,0],[0,0,0,0]]\n\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> We need at least 2 days to get a disconnected grid.\nChange land grid[1][1] and grid[0][2] to water and get 2 disconnected island.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/12/24/land2.jpg\" style=\"width: 404px; height: 85px;\" />\n<pre>\n<strong>Input:</strong> grid = [[1,1]]\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> Grid of full water is also disconnected ([[1,1]] -&gt; [[0,0]]), 0 islands.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>m == grid.length</code></li>\n\t<li><code>n == grid[i].length</code></li>\n\t<li><code>1 &lt;= m, n &lt;= 30</code></li>\n\t<li><code>grid[i][j]</code> is either <code>0</code> or <code>1</code>.</li>\n</ul>\n",
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                    "code": "class Solution(object):\n    def minDays(self, grid):\n        \"\"\"\n        :type grid: List[List[int]]\n        :rtype: int\n        \"\"\"\n        ",
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            "hints": [
                "Return 0 if the grid is already disconnected.",
                "Return 1 if changing a single land to water disconnect the island.",
                "Otherwise return 2.",
                "We can disconnect the grid within at most 2 days."
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