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"translatedContent": "<p>给你一个整数数组 <code>nums</code> ,判断这个数组中是否存在长度为 <code>3</code> 的递增子序列。</p>\n\n<p>如果存在这样的三元组下标 <code>(i, j, k)</code> 且满足 <code>i < j < k</code> ,使得 <code>nums[i] < nums[j] < nums[k]</code> ,返回 <code>true</code> ;否则,返回 <code>false</code> 。</p>\n\n<p> </p>\n\n<p><strong>示例 1:</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [1,2,3,4,5]\n<strong>输出:</strong>true\n<strong>解释:</strong>任何 i < j < k 的三元组都满足题意\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [5,4,3,2,1]\n<strong>输出:</strong>false\n<strong>解释:</strong>不存在满足题意的三元组</pre>\n\n<p><strong>示例 3:</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [2,1,5,0,4,6]\n<strong>输出:</strong>true\n<strong>解释:</strong>三元组 (3, 4, 5) 满足题意,因为 nums[3] == 0 < nums[4] == 4 < nums[5] == 6\n</pre>\n\n<p> </p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 <= nums.length <= 5 * 10<sup>5</sup></code></li>\n\t<li><code>-2<sup>31</sup> <= nums[i] <= 2<sup>31</sup> - 1</code></li>\n</ul>\n\n<p> </p>\n\n<p><strong>进阶:</strong>你能实现时间复杂度为 <code>O(n)</code> ,空间复杂度为 <code>O(1)</code> 的解决方案吗?</p>\n",
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