leetcode-problemset/leetcode-cn/originData/7LpjUW.json

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            "questionId": "1000318",
            "questionFrontendId": "LCR 118",
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            "title": "冗余连接",
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            "content": "<p>English description is not available for the problem. Please switch to Chinese.</p>\n",
            "translatedTitle": "冗余连接",
            "translatedContent": "<p>树可以看成是一个连通且 <strong>无环&nbsp;</strong>的&nbsp;<strong>无向&nbsp;</strong>图。</p>\n\n<p>给定往一棵&nbsp;<code>n</code> 个节点 (节点值&nbsp;<code>1～n</code>) 的树中添加一条边后的图。添加的边的两个顶点包含在 <code>1</code> 到 <code>n</code>&nbsp;中间，且这条附加的边不属于树中已存在的边。图的信息记录于长度为 <code>n</code> 的二维数组 <code>edges</code>&nbsp;，<code>edges[i] = [a<sub>i</sub>, b<sub>i</sub>]</code>&nbsp;表示图中在 <code>ai</code> 和 <code>bi</code> 之间存在一条边。</p>\n\n<p>请找出一条可以删去的边，删除后可使得剩余部分是一个有着 <code>n</code> 个节点的树。如果有多个答案，则返回数组&nbsp;<code>edges</code>&nbsp;中最后出现的边。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<p><img alt=\"\" src=\"https://pic.leetcode-cn.com/1626676174-hOEVUL-image.png\" style=\"width: 152px; \" /></p>\n\n<pre>\n<strong>输入:</strong> edges = [[1,2],[1,3],[2,3]]\n<strong>输出:</strong> [2,3]\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<p><img alt=\"\" src=\"https://pic.leetcode-cn.com/1626676179-kGxcmu-image.png\" style=\"width: 250px; \" /></p>\n\n<pre>\n<strong>输入:</strong> edges = [[1,2],[2,3],[3,4],[1,4],[1,5]]\n<strong>输出:</strong> [1,4]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>n == edges.length</code></li>\n\t<li><code>3 &lt;= n &lt;= 1000</code></li>\n\t<li><code>edges[i].length == 2</code></li>\n\t<li><code>1 &lt;= ai&nbsp;&lt; bi&nbsp;&lt;= edges.length</code></li>\n\t<li><code>ai != bi</code></li>\n\t<li><code>edges</code> 中无重复元素</li>\n\t<li>给定的图是连通的&nbsp;</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><meta charset=\"UTF-8\" />注意：本题与主站 684&nbsp;题相同：&nbsp;<a href=\"https://leetcode-cn.com/problems/redundant-connection/\">https://leetcode-cn.com/problems/redundant-connection/</a></p>\n",
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