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            "content": "<p>Alice and Bob take turns playing a game, with <strong>Alice</strong><strong>&nbsp;starting first</strong>.</p>\n\n<p>You are given a string <code>num</code> of <strong>even length</strong> consisting of digits and <code>&#39;?&#39;</code> characters. On each turn, a player will do the following if there is still at least one <code>&#39;?&#39;</code> in <code>num</code>:</p>\n\n<ol>\n\t<li>Choose an index <code>i</code> where <code>num[i] == &#39;?&#39;</code>.</li>\n\t<li>Replace <code>num[i]</code> with any digit between <code>&#39;0&#39;</code> and <code>&#39;9&#39;</code>.</li>\n</ol>\n\n<p>The game ends when there are no more <code>&#39;?&#39;</code> characters in <code>num</code>.</p>\n\n<p>For Bob&nbsp;to win, the sum of the digits in the first half of <code>num</code> must be <strong>equal</strong> to the sum of the digits in the second half. For Alice&nbsp;to win, the sums must <strong>not be equal</strong>.</p>\n\n<ul>\n\t<li>For example, if the game ended with <code>num = &quot;243801&quot;</code>, then Bob&nbsp;wins because <code>2+4+3 = 8+0+1</code>. If the game ended with <code>num = &quot;243803&quot;</code>, then Alice&nbsp;wins because <code>2+4+3 != 8+0+3</code>.</li>\n</ul>\n\n<p>Assuming Alice and Bob play <strong>optimally</strong>, return <code>true</code> <em>if Alice will win and </em><code>false</code> <em>if Bob will win</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> num = &quot;5023&quot;\n<strong>Output:</strong> false\n<strong>Explanation:</strong> There are no moves to be made.\nThe sum of the first half is equal to the sum of the second half: 5 + 0 = 2 + 3.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> num = &quot;25??&quot;\n<strong>Output:</strong> true\n<strong>Explanation: </strong>Alice can replace one of the &#39;?&#39;s with &#39;9&#39; and it will be impossible for Bob to make the sums equal.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> num = &quot;?3295???&quot;\n<strong>Output:</strong> false\n<strong>Explanation:</strong> It can be proven that Bob will always win. One possible outcome is:\n- Alice replaces the first &#39;?&#39; with &#39;9&#39;. num = &quot;93295???&quot;.\n- Bob replaces one of the &#39;?&#39; in the right half with &#39;9&#39;. num = &quot;932959??&quot;.\n- Alice replaces one of the &#39;?&#39; in the right half with &#39;2&#39;. num = &quot;9329592?&quot;.\n- Bob replaces the last &#39;?&#39; in the right half with &#39;7&#39;. num = &quot;93295927&quot;.\nBob wins because 9 + 3 + 2 + 9 = 5 + 9 + 2 + 7.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 &lt;= num.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>num.length</code> is <strong>even</strong>.</li>\n\t<li><code>num</code> consists of only digits and <code>&#39;?&#39;</code>.</li>\n</ul>\n",
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                "Bob can always make the total sum of both sides equal in mod 9.",
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