leetcode-problemset/leetcode-cn/originData/maximum-number-of-pairs-in-array.json

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            "categoryTitle": "Algorithms",
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            "title": "Maximum Number of Pairs in Array",
            "titleSlug": "maximum-number-of-pairs-in-array",
            "content": "<p>You are given a <strong>0-indexed</strong> integer array <code>nums</code>. In one operation, you may do the following:</p>\n\n<ul>\n\t<li>Choose <strong>two</strong> integers in <code>nums</code> that are <strong>equal</strong>.</li>\n\t<li>Remove both integers from <code>nums</code>, forming a <strong>pair</strong>.</li>\n</ul>\n\n<p>The operation is done on <code>nums</code> as many times as possible.</p>\n\n<p>Return <em>a <strong>0-indexed</strong> integer array </em><code>answer</code><em> of size </em><code>2</code><em> where </em><code>answer[0]</code><em> is the number of pairs that are formed and </em><code>answer[1]</code><em> is the number of leftover integers in </em><code>nums</code><em> after doing the operation as many times as possible</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,3,2,1,3,2,2]\n<strong>Output:</strong> [3,1]\n<strong>Explanation:</strong>\nForm a pair with nums[0] and nums[3] and remove them from nums. Now, nums = [3,2,3,2,2].\nForm a pair with nums[0] and nums[2] and remove them from nums. Now, nums = [2,2,2].\nForm a pair with nums[0] and nums[1] and remove them from nums. Now, nums = [2].\nNo more pairs can be formed. A total of 3 pairs have been formed, and there is 1 number leftover in nums.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,1]\n<strong>Output:</strong> [1,0]\n<strong>Explanation:</strong> Form a pair with nums[0] and nums[1] and remove them from nums. Now, nums = [].\nNo more pairs can be formed. A total of 1 pair has been formed, and there are 0 numbers leftover in nums.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [0]\n<strong>Output:</strong> [0,1]\n<strong>Explanation:</strong> No pairs can be formed, and there is 1 number leftover in nums.\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;= 100</code></li>\n\t<li><code>0 &lt;= nums[i] &lt;= 100</code></li>\n</ul>\n",
            "translatedTitle": "数组能形成多少数对",
            "translatedContent": "<p>给你一个下标从 <strong>0</strong> 开始的整数数组 <code>nums</code> 。在一步操作中，你可以执行以下步骤：</p>\n\n<ul>\n\t<li>从 <code>nums</code> 选出 <strong>两个</strong> <strong>相等的</strong> 整数</li>\n\t<li>从 <code>nums</code> 中移除这两个整数，形成一个 <strong>数对</strong></li>\n</ul>\n\n<p>请你在 <code>nums</code> 上多次执行此操作直到无法继续执行。</p>\n\n<p>返回一个下标从 <strong>0</strong> 开始、长度为 <code>2</code> 的整数数组 <code>answer</code> 作为答案，其中<em> </em><code>answer[0]</code><em> </em>是形成的数对数目，<code>answer[1]</code> 是对 <code>nums</code> 尽可能执行上述操作后剩下的整数数目。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre><strong>输入：</strong>nums = [1,3,2,1,3,2,2]\n<strong>输出：</strong>[3,1]\n<strong>解释：</strong>\nnums[0] 和 nums[3] 形成一个数对，并从 nums 中移除，nums = [3,2,3,2,2] 。\nnums[0] 和 nums[2] 形成一个数对，并从 nums 中移除，nums = [2,2,2] 。\nnums[0] 和 nums[1] 形成一个数对，并从 nums 中移除，nums = [2] 。\n无法形成更多数对。总共形成 3 个数对，nums 中剩下 1 个数字。</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><strong>输入：</strong>nums = [1,1]\n<strong>输出：</strong>[1,0]\n<strong>解释：</strong>nums[0] 和 nums[1] 形成一个数对，并从 nums 中移除，nums = [] 。\n无法形成更多数对。总共形成 1 个数对，nums 中剩下 0 个数字。</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre><strong>输入：</strong>nums = [0]\n<strong>输出：</strong>[0,1]\n<strong>解释：</strong>无法形成数对，nums 中剩下 1 个数字。\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;= 100</code></li>\n\t<li><code>0 &lt;= nums[i] &lt;= 100</code></li>\n</ul>\n",
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