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"boundTopicId": 481396,
"title": "Minimum Deletions to Make String Balanced",
"titleSlug": "minimum-deletions-to-make-string-balanced",
"content": "<p>You are given a string <code>s</code> consisting only of characters <code>&#39;a&#39;</code> and <code>&#39;b&#39;</code>.</p>\n\n<p>You can delete any number of characters in <code>s</code> to make <code>s</code> <strong>balanced</strong>. <code>s</code> is <strong>balanced</strong> if there is no pair of indices <code>(i,j)</code> such that <code>i &lt; j</code> and <code>s[i] = &#39;b&#39;</code> and <code>s[j]= &#39;a&#39;</code>.</p>\n\n<p>Return <em>the <strong>minimum</strong> number of deletions needed to make </em><code>s</code><em> <strong>balanced</strong></em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;aababbab&quot;\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> You can either:\nDelete the characters at 0-indexed positions 2 and 6 (&quot;aa<u>b</u>abb<u>a</u>b&quot; -&gt; &quot;aaabbb&quot;), or\nDelete the characters at 0-indexed positions 3 and 6 (&quot;aab<u>a</u>bb<u>a</u>b&quot; -&gt; &quot;aabbbb&quot;).\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;bbaaaaabb&quot;\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> The only solution is to delete the first two characters.\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;= 10<sup>5</sup></code></li>\n\t<li><code>s[i]</code> is&nbsp;<code>&#39;a&#39;</code> or <code>&#39;b&#39;</code>.</li>\n</ul>\n",
"content": "<p>You are given a string <code>s</code> consisting only of characters <code>&#39;a&#39;</code> and <code>&#39;b&#39;</code>.</p>\n\n<p>You can delete any number of characters in <code>s</code> to make <code>s</code> <strong>balanced</strong>. <code>s</code> is <strong>balanced</strong> if there is no pair of indices <code>(i,j)</code> such that <code>i &lt; j</code> and <code>s[i] = &#39;b&#39;</code> and <code>s[j]= &#39;a&#39;</code>.</p>\n\n<p>Return <em>the <strong>minimum</strong> number of deletions needed to make </em><code>s</code><em> <strong>balanced</strong></em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;aababbab&quot;\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> You can either:\nDelete the characters at 0-indexed positions 2 and 6 (&quot;aa<u>b</u>abb<u>a</u>b&quot; -&gt; &quot;aaabbb&quot;), or\nDelete the characters at 0-indexed positions 3 and 6 (&quot;aab<u>a</u>bb<u>a</u>b&quot; -&gt; &quot;aabbbb&quot;).\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;bbaaaaabb&quot;\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> The only solution is to delete the first two characters.\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;= 10<sup>5</sup></code></li>\n\t<li><code>s[i]</code> is&nbsp;<code>&#39;a&#39;</code> or <code>&#39;b&#39;</code>.</li>\n</ul>\n",
"translatedTitle": "使字符串平衡的最少删除次数",
"translatedContent": "<p>给你一个字符串&nbsp;<code>s</code>&nbsp;,它仅包含字符&nbsp;<code>'a'</code> 和&nbsp;<code>'b'</code> 。</p>\n\n<p>你可以删除&nbsp;<code>s</code>&nbsp;中任意数目的字符,使得&nbsp;<code>s</code> <strong>平衡</strong>&nbsp;。当不存在下标对&nbsp;<code>(i,j)</code>&nbsp;满足&nbsp;<code>i &lt; j</code> ,且&nbsp;<code>s[i] = 'b'</code> 的同时&nbsp;<code>s[j]= 'a'</code> ,此时认为 <code>s</code> 是 <strong>平衡 </strong>的。</p>\n\n<p>请你返回使 <code>s</code>&nbsp;<strong>平衡</strong>&nbsp;的 <strong>最少</strong>&nbsp;删除次数。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n\n<pre>\n<b>输入:</b>s = \"aababbab\"\n<b>输出:</b>2\n<b>解释:</b>你可以选择以下任意一种方案:\n下标从 0 开始,删除第 2 和第 6 个字符(\"aa<strong>b</strong>abb<strong>a</strong>b\" -&gt; \"aaabbb\"\n下标从 0 开始,删除第 3 和第 6 个字符(\"aab<strong>a</strong>bb<strong>a</strong>b\" -&gt; \"aabbbb\")。\n</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre>\n<b>输入:</b>s = \"bbaaaaabb\"\n<b>输出:</b>2\n<b>解释:</b>唯一的最优解是删除最前面两个字符。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>s[i]</code>&nbsp;要么是&nbsp;<code>'a'</code> 要么是&nbsp;<code>'b'</code><strong>&nbsp;</strong>。</li>\n</ul>\n",
"translatedContent": "<p>给你一个字符串&nbsp;<code>s</code>&nbsp;,它仅包含字符&nbsp;<code>'a'</code> 和&nbsp;<code>'b'</code> 。</p>\n\n<p>你可以删除&nbsp;<code>s</code>&nbsp;中任意数目的字符,使得&nbsp;<code>s</code> <strong>平衡</strong>&nbsp;。当不存在下标对&nbsp;<code>(i,j)</code>&nbsp;满足&nbsp;<code>i &lt; j</code> ,且&nbsp;<code>s[i] = 'b'</code> 的同时&nbsp;<code>s[j]= 'a'</code> ,此时认为 <code>s</code> 是 <strong>平衡 </strong>的。</p>\n\n<p>请你返回使 <code>s</code>&nbsp;<strong>平衡</strong>&nbsp;的 <strong>最少</strong>&nbsp;删除次数。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n\n<pre>\n<b>输入:</b>s = \"aababbab\"\n<b>输出:</b>2\n<b>解释:</b>你可以选择以下任意一种方案:\n下标从 0 开始,删除第 2 和第 6 个字符(\"aa<strong>b</strong>abb<strong>a</strong>b\" -&gt; \"aaabbb\"\n下标从 0 开始,删除第 3 和第 6 个字符(\"aab<strong>a</strong>bb<strong>a</strong>b\" -&gt; \"aabbbb\")。\n</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre>\n<b>输入:</b>s = \"bbaaaaabb\"\n<b>输出:</b>2\n<b>解释:</b>唯一的最优解是删除最前面两个字符。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>s[i]</code>&nbsp;要么是&nbsp;<code>'a'</code> 要么是&nbsp;<code>'b'</code><strong>&nbsp;</strong>。</li>\n</ul>\n",
"isPaidOnly": false,
"difficulty": "Medium",
"likes": 199,