mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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214 lines
23 KiB
JSON
214 lines
23 KiB
JSON
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"title": "Number of Squareful Arrays",
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"content": "<p>An array is <strong>squareful</strong> if the sum of every pair of adjacent elements is a <strong>perfect square</strong>.</p>\n\n<p>Given an integer array nums, return <em>the number of permutations of </em><code>nums</code><em> that are <strong>squareful</strong></em>.</p>\n\n<p>Two permutations <code>perm1</code> and <code>perm2</code> are different if there is some index <code>i</code> such that <code>perm1[i] != perm2[i]</code>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,17,8]\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> [1,8,17] and [17,8,1] are the valid permutations.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [2,2,2]\n<strong>Output:</strong> 1\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= nums.length <= 12</code></li>\n\t<li><code>0 <= nums[i] <= 10<sup>9</sup></code></li>\n</ul>\n",
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"translatedContent": "<p>如果一个数组的任意两个相邻元素之和都是 <strong>完全平方数 </strong>，则该数组称为 <strong>平方数组 </strong>。</p>\n\n<p>给定一个整数数组 <code>nums</code>，返回所有属于 <strong>平方数组 </strong>的 <code>nums</code> 的排列数量。</p>\n\n<p>如果存在某个索引 <code>i</code> 使得 <code>perm1[i] != perm2[i]</code>，则认为两个排列 <code>perm1</code> 和 <code>perm2</code> 不同。</p>\n\n<p> </p>\n\n<p><strong class=\"example\">示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>nums = [1,17,8]\n<strong>输出：</strong>2\n<strong>解释：</strong>[1,8,17] 和 [17,8,1] 是有效的排列。\n</pre>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>nums = [2,2,2]\n<strong>输出：</strong>1\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 <= nums.length <= 12</code></li>\n\t<li><code>0 <= nums[i] <= 10<sup>9</sup></code></li>\n</ul>\n",
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