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            "title": "Minimum Moves to Convert String",
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            "content": "<p>You are given a string <code>s</code> consisting of <code>n</code> characters which are either <code>&#39;X&#39;</code> or <code>&#39;O&#39;</code>.</p>\n\n<p>A <strong>move</strong> is defined as selecting <strong>three</strong> <strong>consecutive characters</strong> of <code>s</code> and converting them to <code>&#39;O&#39;</code>. Note that if a move is applied to the character <code>&#39;O&#39;</code>, it will stay the <strong>same</strong>.</p>\n\n<p>Return <em>the <strong>minimum</strong> number of moves required so that all the characters of </em><code>s</code><em> are converted to </em><code>&#39;O&#39;</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;XXX&quot;\n<strong>Output:</strong> 1\n<strong>Explanation:</strong> <u>XXX</u> -&gt; OOO\nWe select all the 3 characters and convert them in one move.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;XXOX&quot;\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> <u>XXO</u>X -&gt; O<u>OOX</u> -&gt; OOOO\nWe select the first 3 characters in the first move, and convert them to <code>&#39;O&#39;</code>.\nThen we select the last 3 characters and convert them so that the final string contains all <code>&#39;O&#39;</code>s.</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;OOOO&quot;\n<strong>Output:</strong> 0\n<strong>Explanation:</strong> There are no <code>&#39;X&#39;s</code> in <code>s</code> to convert.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>3 &lt;= s.length &lt;= 1000</code></li>\n\t<li><code>s[i]</code> is either <code>&#39;X&#39;</code> or <code>&#39;O&#39;</code>.</li>\n</ul>\n",
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                "Find the smallest substring you need to consider at a time.",
                "Try delaying a move as long as possible."
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