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        "question": {
            "questionId": "1760",
            "questionFrontendId": "1640",
            "categoryTitle": "Algorithms",
            "boundTopicId": 464635,
            "title": "Check Array Formation Through Concatenation",
            "titleSlug": "check-array-formation-through-concatenation",
            "content": "<p>You are given an array of <strong>distinct</strong> integers <code>arr</code> and an array of integer arrays <code>pieces</code>, where the integers in <code>pieces</code> are <strong>distinct</strong>. Your goal is to form <code>arr</code> by concatenating the arrays in <code>pieces</code> <strong>in any order</strong>. However, you are <strong>not</strong> allowed to reorder the integers in each array <code>pieces[i]</code>.</p>\n\n<p>Return <code>true</code> <em>if it is possible </em><em>to form the array </em><code>arr</code><em> from </em><code>pieces</code>. Otherwise, return <code>false</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [15,88], pieces = [[88],[15]]\n<strong>Output:</strong> true\n<strong>Explanation:</strong> Concatenate [15] then [88]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [49,18,16], pieces = [[16,18,49]]\n<strong>Output:</strong> false\n<strong>Explanation:</strong> Even though the numbers match, we cannot reorder pieces[0].\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [91,4,64,78], pieces = [[78],[4,64],[91]]\n<strong>Output:</strong> true\n<strong>Explanation:</strong> Concatenate [91] then [4,64] then [78]\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= pieces.length &lt;= arr.length &lt;= 100</code></li>\n\t<li><code>sum(pieces[i].length) == arr.length</code></li>\n\t<li><code>1 &lt;= pieces[i].length &lt;= arr.length</code></li>\n\t<li><code>1 &lt;= arr[i], pieces[i][j] &lt;= 100</code></li>\n\t<li>The integers in <code>arr</code> are <strong>distinct</strong>.</li>\n\t<li>The integers in <code>pieces</code> are <strong>distinct</strong> (i.e., If we flatten pieces in a 1D array, all the integers in this array are distinct).</li>\n</ul>\n",
            "translatedTitle": "能否连接形成数组",
            "translatedContent": "<p>给你一个整数数组 <code>arr</code> ，数组中的每个整数 <strong>互不相同</strong> 。另有一个由整数数组构成的数组 <code>pieces</code>，其中的整数也 <strong>互不相同</strong> 。请你以 <strong>任意顺序</strong> 连接 <code>pieces</code> 中的数组以形成 <code>arr</code> 。但是，<strong>不允许</strong> 对每个数组 <code>pieces[i]</code> 中的整数重新排序。</p>\n\n<p>如果可以连接<em> </em><code>pieces</code> 中的数组形成 <code>arr</code> ，返回 <code>true</code> ；否则，返回 <code>false</code> 。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>arr = [15,88], pieces = [[88],[15]]\n<strong>输出：</strong>true\n<strong>解释：</strong>依次连接 <code>[15]</code> 和 <code>[88]</code>\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>arr = [49,18,16], pieces = [[16,18,49]]\n<strong>输出：</strong>false\n<strong>解释：</strong>即便数字相符，也不能重新排列 pieces[0]\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>arr = [91,4,64,78], pieces = [[78],[4,64],[91]]\n<strong>输出：</strong>true\n<strong>解释：</strong>依次连接 <code>[91]</code>、<code>[4,64]</code> 和 <code>[78]</code></pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= pieces.length &lt;= arr.length &lt;= 100</code></li>\n\t<li><code>sum(pieces[i].length) == arr.length</code></li>\n\t<li><code>1 &lt;= pieces[i].length &lt;= arr.length</code></li>\n\t<li><code>1 &lt;= arr[i], pieces[i][j] &lt;= 100</code></li>\n\t<li><code>arr</code> 中的整数 <strong>互不相同</strong></li>\n\t<li><code>pieces</code> 中的整数 <strong>互不相同</strong>（也就是说，如果将 <code>pieces</code> 扁平化成一维数组，数组中的所有整数互不相同）</li>\n</ul>\n",
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                "Note that the distinct part means that every position in the array belongs to only one piece",
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