leetcode-problemset/leetcode/originData/minimum-number-of-moves-to-make-palindrome.json

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            "title": "Minimum Number of Moves to Make Palindrome",
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            "content": "<p>You are given a string <code>s</code> consisting only of lowercase English letters.</p>\n\n<p>In one <strong>move</strong>, you can select any two <strong>adjacent</strong> characters of <code>s</code> and swap them.</p>\n\n<p>Return <em>the <strong>minimum number of moves</strong> needed to make</em> <code>s</code> <em>a palindrome</em>.</p>\n\n<p><strong>Note</strong> that the input will be generated such that <code>s</code> can always be converted to a palindrome.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;aabb&quot;\n<strong>Output:</strong> 2\n<strong>Explanation:</strong>\nWe can obtain two palindromes from s, &quot;abba&quot; and &quot;baab&quot;. \n- We can obtain &quot;abba&quot; from s in 2 moves: &quot;a<u><strong>ab</strong></u>b&quot; -&gt; &quot;ab<u><strong>ab</strong></u>&quot; -&gt; &quot;abba&quot;.\n- We can obtain &quot;baab&quot; from s in 2 moves: &quot;a<u><strong>ab</strong></u>b&quot; -&gt; &quot;<u><strong>ab</strong></u>ab&quot; -&gt; &quot;baab&quot;.\nThus, the minimum number of moves needed to make s a palindrome is 2.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;letelt&quot;\n<strong>Output:</strong> 2\n<strong>Explanation:</strong>\nOne of the palindromes we can obtain from s in 2 moves is &quot;lettel&quot;.\nOne of the ways we can obtain it is &quot;lete<u><strong>lt</strong></u>&quot; -&gt; &quot;let<u><strong>et</strong></u>l&quot; -&gt; &quot;lettel&quot;.\nOther palindromes such as &quot;tleelt&quot; can also be obtained in 2 moves.\nIt can be shown that it is not possible to obtain a palindrome in less than 2 moves.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 2000</code></li>\n\t<li><code>s</code> consists only of lowercase English letters.</li>\n\t<li><code>s</code> can be converted to a palindrome using a finite number of moves.</li>\n</ul>\n",
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                    "code": "class Solution(object):\n    def minMovesToMakePalindrome(self, s):\n        \"\"\"\n        :type s: str\n        :rtype: int\n        \"\"\"\n        ",
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            "hints": [
                "Consider a greedy strategy.",
                "Let’s start by making the leftmost and rightmost characters match with some number of swaps.",
                "If we figure out how to do that using the minimum number of swaps, then we can delete the leftmost and rightmost characters and solve the problem recursively."
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