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"translatedContent": "<p>力扣数据中心有&nbsp;<code>n</code>&nbsp;台服务器,分别按从&nbsp;<code>0</code>&nbsp;到&nbsp;<code>n-1</code>&nbsp;的方式进行了编号。它们之间以「服务器到服务器」点对点的形式相互连接组成了一个内部集群,其中连接&nbsp;<code>connections</code> 是无向的。从形式上讲,<code>connections[i] = [a, b]</code>&nbsp;表示服务器 <code>a</code>&nbsp;和 <code>b</code>&nbsp;之间形成连接。任何服务器都可以直接或者间接地通过网络到达任何其他服务器。</p>\n\n<p><em>「关键连接」</em>&nbsp;是在该集群中的重要连接,也就是说,假如我们将它移除,便会导致某些服务器无法访问其他服务器。</p>\n\n<p>请你以任意顺序返回该集群内的所有 「关键连接」。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n\n<p><strong><img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/original_images/critical-connections-in-a-network.png\" style=\"height: 205px; width: 200px;\" /></strong></p>\n\n<pre>\n<strong>输入:</strong>n = 4, connections = [[0,1],[1,2],[2,0],[1,3]]\n<strong>输出:</strong>[[1,3]]\n<strong>解释:</strong>[[3,1]] 也是正确的。</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<b>输入:</b>n = 2, connections = [[0,1]]\n<b>输出:</b>[[0,1]]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= n &lt;= 10^5</code></li>\n\t<li><code>n-1 &lt;= connections.length &lt;= 10^5</code></li>\n\t<li><code>connections[i][0] != connections[i][1]</code></li>\n\t<li>不存在重复的连接</li>\n</ul>\n",
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"difficulty": "Hard",
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"similarQuestions": "[]",
@@ -149,7 +149,7 @@
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"hints": [
"Use Tarjan's algorithm."
],