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leetcode-cn/problem (English)/冗余连接 II(English) [redundant-connection-ii].html
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<p>Return <em>an edge that can be removed so that the resulting graph is a rooted tree of</em> <code>n</code> <em>nodes</em>. If there are multiple answers, return the answer that occurs last in the given 2D-array.</p>
<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>
<p><strong class="example">Example 1:</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2020/12/20/graph1.jpg" style="width: 222px; height: 222px;" />
<pre>
<strong>Input:</strong> edges = [[1,2],[1,3],[2,3]]
<strong>Output:</strong> [2,3]
</pre>
<p><strong>Example 2:</strong></p>
<p><strong class="example">Example 2:</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2020/12/20/graph2.jpg" style="width: 222px; height: 382px;" />
<pre>
<strong>Input:</strong> edges = [[1,2],[2,3],[3,4],[4,1],[1,5]]