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"translatedContent": "<p>编写代码,移除未排序链表中的重复节点。保留最开始出现的节点。</p>\n\n<p> <strong>示例1:</strong></p>\n\n<pre>\n<strong> 输入</strong>:[1, 2, 3, 3, 2, 1]\n<strong> 输出</strong>:[1, 2, 3]\n</pre>\n\n<p> <strong>示例2:</strong></p>\n\n<pre>\n<strong> 输入</strong>:[1, 1, 1, 1, 2]\n<strong> 输出</strong>:[1, 2]\n</pre>\n\n<p><strong>提示:</strong></p>\n\n<ol>\n<li>链表长度在[0, 20000]范围内。</li>\n<li>链表元素在[0, 20000]范围内。</li>\n</ol>\n\n<p> <strong>进阶:</strong></p>\n\n<p>如果不得使用临时缓冲区,该怎么解决?</p>\n",
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"difficulty": "Easy",
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"similarQuestions": "[]",
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@@ -149,7 +149,7 @@
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"__typename": "CodeSnippetNode"
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}
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"hints": [
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"你有没有试过一个散列表?你应该可以通过一次链表遍历做到这一点。",
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"没有额外的空间,你需要O(N2)的时间。尝试使用两个指针,其中第二个指针在第一个指针之前搜索。"
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