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{
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"question": {
"questionId": "491",
"questionFrontendId": "491",
"categoryTitle": "Algorithms",
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"title": "Increasing Subsequences",
"titleSlug": "increasing-subsequences",
"content": "<p>Given an integer array <code>nums</code>, return all the different possible increasing subsequences of the given array with <strong>at least two elements</strong>. You may return the answer in <strong>any order</strong>.</p>\n\n<p>The given array may contain duplicates, and two equal integers should also be considered a special case of increasing sequence.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [4,6,7,7]\n<strong>Output:</strong> [[4,6],[4,6,7],[4,6,7,7],[4,7],[4,7,7],[6,7],[6,7,7],[7,7]]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [4,4,3,2,1]\n<strong>Output:</strong> [[4,4]]\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 15</code></li>\n\t<li><code>-100 &lt;= nums[i] &lt;= 100</code></li>\n</ul>\n",
"translatedTitle": "递增子序列",
"translatedContent": "<p>给你一个整数数组 <code>nums</code> ,找出并返回所有该数组中不同的递增子序列,递增子序列中 <strong>至少有两个元素</strong> 。你可以按 <strong>任意顺序</strong> 返回答案。</p>\n\n<p>数组中可能含有重复元素,如出现两个整数相等,也可以视作递增序列的一种特殊情况。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [4,6,7,7]\n<strong>输出:</strong>[[4,6],[4,6,7],[4,6,7,7],[4,7],[4,7,7],[6,7],[6,7,7],[7,7]]\n</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [4,4,3,2,1]\n<strong>输出:</strong>[[4,4]]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 15</code></li>\n\t<li><code>-100 &lt;= nums[i] &lt;= 100</code></li>\n</ul>\n",
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