leetcode-problemset/leetcode-cn/originData/finding-3-digit-even-numbers.json

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            "questionId": "2215",
            "questionFrontendId": "2094",
            "categoryTitle": "Algorithms",
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            "title": "Finding 3-Digit Even Numbers",
            "titleSlug": "finding-3-digit-even-numbers",
            "content": "<p>You are given an integer array <code>digits</code>, where each element is a digit. The array may contain duplicates.</p>\n\n<p>You need to find <strong>all</strong> the <strong>unique</strong> integers that follow the given requirements:</p>\n\n<ul>\n\t<li>The integer consists of the <strong>concatenation</strong> of <strong>three</strong> elements from <code>digits</code> in <strong>any</strong> arbitrary order.</li>\n\t<li>The integer does not have <strong>leading zeros</strong>.</li>\n\t<li>The integer is <strong>even</strong>.</li>\n</ul>\n\n<p>For example, if the given <code>digits</code> were <code>[1, 2, 3]</code>, integers <code>132</code> and <code>312</code> follow the requirements.</p>\n\n<p>Return <em>a <strong>sorted</strong> array of the unique integers.</em></p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> digits = [2,1,3,0]\n<strong>Output:</strong> [102,120,130,132,210,230,302,310,312,320]\n<strong>Explanation:</strong> All the possible integers that follow the requirements are in the output array. \nNotice that there are no <strong>odd</strong> integers or integers with <strong>leading zeros</strong>.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> digits = [2,2,8,8,2]\n<strong>Output:</strong> [222,228,282,288,822,828,882]\n<strong>Explanation:</strong> The same digit can be used as many times as it appears in digits. \nIn this example, the digit 8 is used twice each time in 288, 828, and 882. \n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> digits = [3,7,5]\n<strong>Output:</strong> []\n<strong>Explanation:</strong> No <strong>even</strong> integers can be formed using the given digits.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>3 &lt;= digits.length &lt;= 100</code></li>\n\t<li><code>0 &lt;= digits[i] &lt;= 9</code></li>\n</ul>\n",
            "translatedTitle": "找出 3 位偶数",
            "translatedContent": "<p>给你一个整数数组 <code>digits</code> ，其中每个元素是一个数字（<code>0 - 9</code>）。数组中可能存在重复元素。</p>\n\n<p>你需要找出 <strong>所有</strong> 满足下述条件且 <strong>互不相同</strong> 的整数：</p>\n\n<ul>\n\t<li>该整数由 <code>digits</code> 中的三个元素按 <strong>任意</strong> 顺序 <strong>依次连接</strong> 组成。</li>\n\t<li>该整数不含 <strong>前导零</strong></li>\n\t<li>该整数是一个 <strong>偶数</strong></li>\n</ul>\n\n<p>例如，给定的 <code>digits</code> 是 <code>[1, 2, 3]</code> ，整数 <code>132</code> 和 <code>312</code> 满足上面列出的全部条件。</p>\n\n<p>将找出的所有互不相同的整数按 <strong>递增顺序</strong> 排列，并以数组形式返回<em>。</em></p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>digits = [2,1,3,0]\n<strong>输出：</strong>[102,120,130,132,210,230,302,310,312,320]\n<strong>解释：</strong>\n所有满足题目条件的整数都在输出数组中列出。 \n注意，答案数组中不含有 <strong>奇数</strong> 或带 <strong>前导零</strong> 的整数。</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>digits = [2,2,8,8,2]\n<strong>输出：</strong>[222,228,282,288,822,828,882]\n<strong>解释：</strong>\n同样的数字（0 - 9）在构造整数时可以重复多次，重复次数最多与其在 <code>digits</code> 中出现的次数一样。 \n在这个例子中，数字 8 在构造 288、828 和 882 时都重复了两次。 \n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>digits = [3,7,5]\n<strong>输出：</strong>[]\n<strong>解释：</strong>\n使用给定的 digits 无法构造偶数。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>3 &lt;=&nbsp;digits.length &lt;= 100</code></li>\n\t<li><code>0 &lt;= digits[i] &lt;= 9</code></li>\n</ul>\n",
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