leetcode-problemset/leetcode-cn/originData/convert-1d-array-into-2d-array.json

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        "question": {
            "questionId": "2132",
            "questionFrontendId": "2022",
            "categoryTitle": "Algorithms",
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            "title": "Convert 1D Array Into 2D Array",
            "titleSlug": "convert-1d-array-into-2d-array",
            "content": "<p>You are given a <strong>0-indexed</strong> 1-dimensional (1D) integer array <code>original</code>, and two integers, <code>m</code> and <code>n</code>. You are tasked with creating a 2-dimensional (2D) array with <code> m</code> rows and <code>n</code> columns using <strong>all</strong> the elements from <code>original</code>.</p>\n\n<p>The elements from indices <code>0</code> to <code>n - 1</code> (<strong>inclusive</strong>) of <code>original</code> should form the first row of the constructed 2D array, the elements from indices <code>n</code> to <code>2 * n - 1</code> (<strong>inclusive</strong>) should form the second row of the constructed 2D array, and so on.</p>\n\n<p>Return <em>an </em><code>m x n</code><em> 2D array constructed according to the above procedure, or an empty 2D array if it is impossible</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img src=\"https://assets.leetcode.com/uploads/2021/08/26/image-20210826114243-1.png\" style=\"width: 500px; height: 174px;\" />\n<pre>\n<strong>Input:</strong> original = [1,2,3,4], m = 2, n = 2\n<strong>Output:</strong> [[1,2],[3,4]]\n<strong>Explanation:</strong> The constructed 2D array should contain 2 rows and 2 columns.\nThe first group of n=2 elements in original, [1,2], becomes the first row in the constructed 2D array.\nThe second group of n=2 elements in original, [3,4], becomes the second row in the constructed 2D array.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> original = [1,2,3], m = 1, n = 3\n<strong>Output:</strong> [[1,2,3]]\n<strong>Explanation:</strong> The constructed 2D array should contain 1 row and 3 columns.\nPut all three elements in original into the first row of the constructed 2D array.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> original = [1,2], m = 1, n = 1\n<strong>Output:</strong> []\n<strong>Explanation:</strong> There are 2 elements in original.\nIt is impossible to fit 2 elements in a 1x1 2D array, so return an empty 2D array.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= original.length &lt;= 5 * 10<sup>4</sup></code></li>\n\t<li><code>1 &lt;= original[i] &lt;= 10<sup>5</sup></code></li>\n\t<li><code>1 &lt;= m, n &lt;= 4 * 10<sup>4</sup></code></li>\n</ul>\n",
            "translatedTitle": "将一维数组转变成二维数组",
            "translatedContent": "<p>给你一个下标从 <strong>0</strong>&nbsp;开始的一维整数数组&nbsp;<code>original</code>&nbsp;和两个整数&nbsp;<code>m</code>&nbsp;和&nbsp;&nbsp;<code>n</code>&nbsp;。你需要使用&nbsp;<code>original</code>&nbsp;中&nbsp;<strong>所有</strong>&nbsp;元素创建一个&nbsp;<code>m</code>&nbsp;行&nbsp;<code>n</code>&nbsp;列的二维数组。</p>\n\n<p><code>original</code>&nbsp;中下标从 <code>0</code>&nbsp;到 <code>n - 1</code>&nbsp;（都 <strong>包含</strong> ）的元素构成二维数组的第一行，下标从 <code>n</code>&nbsp;到 <code>2 * n - 1</code>&nbsp;（都 <strong>包含</strong>&nbsp;）的元素构成二维数组的第二行，依此类推。</p>\n\n<p>请你根据上述过程返回一个<em>&nbsp;</em><code>m x n</code>&nbsp;的二维数组。如果无法构成这样的二维数组，请你返回一个空的二维数组。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n<img src=\"https://assets.leetcode.com/uploads/2021/08/26/image-20210826114243-1.png\" style=\"width: 500px; height: 174px;\">\n<pre><b>输入：</b>original = [1,2,3,4], m = 2, n = 2\n<b>输出：</b>[[1,2],[3,4]]\n<strong>解释：\n</strong>构造出的二维数组应该包含 2 行 2 列。\noriginal 中第一个 n=2 的部分为 [1,2] ，构成二维数组的第一行。\noriginal 中第二个 n=2 的部分为 [3,4] ，构成二维数组的第二行。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><b>输入：</b>original = [1,2,3], m = 1, n = 3\n<b>输出：</b>[[1,2,3]]\n<b>解释：</b>\n构造出的二维数组应该包含 1 行 3 列。\n将 original 中所有三个元素放入第一行中，构成要求的二维数组。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre><b>输入：</b>original = [1,2], m = 1, n = 1\n<b>输出：</b>[]\n<strong>解释：\n</strong>original 中有 2 个元素。\n无法将 2 个元素放入到一个 1x1 的二维数组中，所以返回一个空的二维数组。\n</pre>\n\n<p><strong>示例 4：</strong></p>\n\n<pre><b>输入：</b>original = [3], m = 1, n = 2\n<b>输出：</b>[]\n<strong>解释：</strong>\noriginal 中只有 1 个元素。\n无法将 1 个元素放满一个 1x2 的二维数组，所以返回一个空的二维数组。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= original.length &lt;= 5 * 10<sup>4</sup></code></li>\n\t<li><code>1 &lt;= original[i] &lt;= 10<sup>5</sup></code></li>\n\t<li><code>1 &lt;= m, n &lt;= 4 * 10<sup>4</sup></code></li>\n</ul>\n",
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