leetcode-problemset/leetcode-cn/originData/subarrays-with-k-different-integers.json

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            "questionId": "1034",
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            "categoryTitle": "Algorithms",
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            "title": "Subarrays with K Different Integers",
            "titleSlug": "subarrays-with-k-different-integers",
            "content": "<p>Given an integer array <code>nums</code> and an integer <code>k</code>, return <em>the number of <strong>good subarrays</strong> of </em><code>nums</code>.</p>\n\n<p>A <strong>good array</strong> is an array where the number of different integers in that array is exactly <code>k</code>.</p>\n\n<ul>\n\t<li>For example, <code>[1,2,3,1,2]</code> has <code>3</code> different integers: <code>1</code>, <code>2</code>, and <code>3</code>.</li>\n</ul>\n\n<p>A <strong>subarray</strong> is a <strong>contiguous</strong> part of an array.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,2,1,2,3], k = 2\n<strong>Output:</strong> 7\n<strong>Explanation:</strong> Subarrays formed with exactly 2 different integers: [1,2], [2,1], [1,2], [2,3], [1,2,1], [2,1,2], [1,2,1,2]\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,2,1,3,4], k = 3\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> Subarrays formed with exactly 3 different integers: [1,2,1,3], [2,1,3], [1,3,4].\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;= 2 * 10<sup>4</sup></code></li>\n\t<li><code>1 &lt;= nums[i], k &lt;= nums.length</code></li>\n</ul>\n",
            "translatedTitle": "K 个不同整数的子数组",
            "translatedContent": "<p>给定一个正整数数组 <code>nums</code>和一个整数 <code>k</code>，返回 <code>nums</code> 中 「<strong>好子数组」</strong><em>&nbsp;</em>的数目。</p>\n\n<p>如果 <code>nums</code>&nbsp;的某个子数组中不同整数的个数恰好为 <code>k</code>，则称 <code>nums</code>&nbsp;的这个连续、不一定不同的子数组为 <strong>「</strong><strong>好子数组 」</strong>。</p>\n\n<ul>\n\t<li>例如，<code>[1,2,3,1,2]</code> 中有&nbsp;<code>3</code>&nbsp;个不同的整数：<code>1</code>，<code>2</code>，以及&nbsp;<code>3</code>。</li>\n</ul>\n\n<p><strong>子数组</strong> 是数组的 <strong>连续</strong> 部分。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>nums = [1,2,1,2,3], k = 2\n<strong>输出：</strong>7\n<strong>解释：</strong>恰好由 2 个不同整数组成的子数组：[1,2], [2,1], [1,2], [2,3], [1,2,1], [2,1,2], [1,2,1,2].\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>nums = [1,2,1,3,4], k = 3\n<strong>输出：</strong>3\n<strong>解释：</strong>恰好由 3 个不同整数组成的子数组：[1,2,1,3], [2,1,3], [1,3,4].\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;= 2 * 10<sup>4</sup></code></li>\n\t<li><code>1 &lt;= nums[i], k &lt;= nums.length</code></li>\n</ul>\n",
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