mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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178 lines
20 KiB
JSON
178 lines
20 KiB
JSON
{
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"question": {
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"questionId": "274",
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"questionFrontendId": "274",
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"categoryTitle": "Algorithms",
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"boundTopicId": 1921,
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"title": "H-Index",
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"titleSlug": "h-index",
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"content": "<p>Given an array of integers <code>citations</code> where <code>citations[i]</code> is the number of citations a researcher received for their <code>i<sup>th</sup></code> paper, return compute the researcher's <code>h</code><strong>-index</strong>.</p>\n\n<p>According to the <a href=\"https://en.wikipedia.org/wiki/H-index\" target=\"_blank\">definition of h-index on Wikipedia</a>: A scientist has an index <code>h</code> if <code>h</code> of their <code>n</code> papers have at least <code>h</code> citations each, and the other <code>n − h</code> papers have no more than <code>h</code> citations each.</p>\n\n<p>If there are several possible values for <code>h</code>, the maximum one is taken as the <code>h</code><strong>-index</strong>.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> citations = [3,0,6,1,5]\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> [3,0,6,1,5] means the researcher has 5 papers in total and each of them had received 3, 0, 6, 1, 5 citations respectively.\nSince the researcher has 3 papers with at least 3 citations each and the remaining two with no more than 3 citations each, their h-index is 3.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> citations = [1,3,1]\n<strong>Output:</strong> 1\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == citations.length</code></li>\n\t<li><code>1 <= n <= 5000</code></li>\n\t<li><code>0 <= citations[i] <= 1000</code></li>\n</ul>\n",
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"translatedTitle": "H 指数",
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"translatedContent": "<p>给你一个整数数组 <code>citations</code> ，其中 <code>citations[i]</code> 表示研究者的第 <code>i</code> 篇论文被引用的次数。计算并返回该研究者的 <strong><code>h</code><em> </em>指数</strong>。</p>\n\n<p>根据维基百科上 <a href=\"https://baike.baidu.com/item/h-index/3991452?fr=aladdin\" target=\"_blank\">h 指数的定义</a>：h 代表“高引用次数”，一名科研人员的 <code>h</code><strong>指数</strong>是指他（她）的 （<code>n</code> 篇论文中）<strong>总共</strong>有 <code>h</code> 篇论文分别被引用了<strong>至少</strong> <code>h</code> 次。且其余的 <em><code>n - h</code> </em>篇论文每篇被引用次数 <strong>不超过 </strong><em><code>h</code> </em>次。</p>\n\n<p>如果 <code>h</code><em> </em>有多种可能的值，<strong><code>h</code> 指数 </strong>是其中最大的那个。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong><code>citations = [3,0,6,1,5]</code>\n<strong>输出：</strong>3 \n<strong>解释：</strong>给定数组表示研究者总共有 <code>5</code> 篇论文，每篇论文相应的被引用了 <code>3, 0, 6, 1, 5</code> 次。\n 由于研究者有 <code>3 </code>篇论文每篇 <strong>至少 </strong>被引用了 <code>3</code> 次，其余两篇论文每篇被引用 <strong>不多于</strong> <code>3</code> 次，所以她的 <em>h </em>指数是 <code>3</code>。</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>citations = [1,3,1]\n<strong>输出：</strong>1\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>n == citations.length</code></li>\n\t<li><code>1 <= n <= 5000</code></li>\n\t<li><code>0 <= citations[i] <= 1000</code></li>\n</ul>\n",
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"name": "Counting Sort",
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"hints": [
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"An easy approach is to sort the array first.",
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"What are the possible values of h-index?",
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"A faster approach is to use extra space."
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