leetcode-problemset/leetcode-cn/originData/longest-turbulent-subarray.json

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            "title": "Longest Turbulent Subarray",
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            "content": "<p>Given an integer array <code>arr</code>, return <em>the length of a maximum size turbulent subarray of</em> <code>arr</code>.</p>\n\n<p>A subarray is <strong>turbulent</strong> if the comparison sign flips between each adjacent pair of elements in the subarray.</p>\n\n<p>More formally, a subarray <code>[arr[i], arr[i + 1], ..., arr[j]]</code> of <code>arr</code> is said to be turbulent if and only if:</p>\n\n<ul>\n\t<li>For <code>i &lt;= k &lt; j</code>:\n\n\t<ul>\n\t\t<li><code>arr[k] &gt; arr[k + 1]</code> when <code>k</code> is odd, and</li>\n\t\t<li><code>arr[k] &lt; arr[k + 1]</code> when <code>k</code> is even.</li>\n\t</ul>\n\t</li>\n\t<li>Or, for <code>i &lt;= k &lt; j</code>:\n\t<ul>\n\t\t<li><code>arr[k] &gt; arr[k + 1]</code> when <code>k</code> is even, and</li>\n\t\t<li><code>arr[k] &lt; arr[k + 1]</code> when <code>k</code> is odd.</li>\n\t</ul>\n\t</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [9,4,2,10,7,8,8,1,9]\n<strong>Output:</strong> 5\n<strong>Explanation:</strong> arr[1] &gt; arr[2] &lt; arr[3] &gt; arr[4] &lt; arr[5]\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [4,8,12,16]\n<strong>Output:</strong> 2\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [100]\n<strong>Output:</strong> 1\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= arr.length &lt;= 4 * 10<sup>4</sup></code></li>\n\t<li><code>0 &lt;= arr[i] &lt;= 10<sup>9</sup></code></li>\n</ul>\n",
            "translatedTitle": "最长湍流子数组",
            "translatedContent": "<p>给定一个整数数组 <code>arr</code>&nbsp;，返回 <code>arr</code>&nbsp;的&nbsp;<em>最大湍流子数组的<strong>长度</strong></em><strong>&nbsp;</strong>。</p>\n\n<p>如果比较符号在子数组中的每个相邻元素对之间翻转，则该子数组是&nbsp;<strong>湍流子数组</strong>&nbsp;。</p>\n\n<p>更正式地来说，当 <code>arr</code>&nbsp;的子数组&nbsp;<code>A[i], A[i+1], ..., A[j]</code>&nbsp;满足仅满足下列条件时，我们称其为<em>湍流子数组</em>：</p>\n\n<ul>\n\t<li>若&nbsp;<code>i &lt;= k &lt; j</code>&nbsp;：\n\n\t<ul>\n\t\t<li>当 <code>k</code>&nbsp;为奇数时，&nbsp;<code>A[k] &gt; A[k+1]</code>，且</li>\n\t\t<li>当 <code>k</code> 为偶数时，<code>A[k] &lt; A[k+1]</code>；</li>\n\t</ul>\n\t</li>\n\t<li><strong>或 </strong>若&nbsp;<code>i &lt;= k &lt; j</code>&nbsp;：\n\t<ul>\n\t\t<li>当 <code>k</code> 为偶数时，<code>A[k] &gt; A[k+1]</code>&nbsp;，且</li>\n\t\t<li>当 <code>k</code>&nbsp;为奇数时，&nbsp;<code>A[k] &lt; A[k+1]</code>。</li>\n\t</ul>\n\t</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>arr = [9,4,2,10,7,8,8,1,9]\n<strong>输出：</strong>5\n<strong>解释：</strong>arr[1] &gt; arr[2] &lt; arr[3] &gt; arr[4] &lt; arr[5]</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>arr = [4,8,12,16]\n<strong>输出：</strong>2\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>arr = [100]\n<strong>输出：</strong>1\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= arr.length &lt;= 4 * 10<sup>4</sup></code></li>\n\t<li><code>0 &lt;= arr[i] &lt;= 10<sup>9</sup></code></li>\n</ul>\n",
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