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Description
tab: English
<p>Given the <code>head</code> of a sorted linked list, <em>delete all duplicates such that each element appears only once</em>. Return <em>the linked list <strong>sorted</strong> as well</em>.</p>
<p> </p>
<p><strong class="example">Example 1:</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2021/01/04/list1.jpg" style="width: 302px; height: 242px;" />
<pre>
<strong>Input:</strong> head = [1,1,2]
<strong>Output:</strong> [1,2]
</pre>
<p><strong class="example">Example 2:</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2021/01/04/list2.jpg" style="width: 542px; height: 222px;" />
<pre>
<strong>Input:</strong> head = [1,1,2,3,3]
<strong>Output:</strong> [1,2,3]
</pre>
<p> </p>
<p><strong>Constraints:</strong></p>
<ul>
<li>The number of nodes in the list is in the range <code>[0, 300]</code>.</li>
<li><code>-100 <= Node.val <= 100</code></li>
<li>The list is guaranteed to be <strong>sorted</strong> in ascending order.</li>
</ul>
---
[submissions](https://leetcode.com/problems/remove-duplicates-from-sorted-list/submissions/) | [solutions](https://leetcode.com/problems/remove-duplicates-from-sorted-list/solutions/)
tab: 中文
<p>给定一个已排序的链表的头<meta charset="UTF-8" /> <code>head</code> ， <em>删除所有重复的元素，使每个元素只出现一次</em> 。返回 <em>已排序的链表</em> 。</p>
<p> </p>
<p><strong>示例 1：</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2021/01/04/list1.jpg" style="height: 160px; width: 200px;" />
<pre>
<strong>输入：</strong>head = [1,1,2]
<strong>输出：</strong>[1,2]
</pre>
<p><strong>示例 2：</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2021/01/04/list2.jpg" style="height: 123px; width: 300px;" />
<pre>
<strong>输入：</strong>head = [1,1,2,3,3]
<strong>输出：</strong>[1,2,3]
</pre>
<p> </p>
<p><strong>提示：</strong></p>
<ul>
<li>链表中节点数目在范围 <code>[0, 300]</code> 内</li>
<li><code>-100 <= Node.val <= 100</code></li>
<li>题目数据保证链表已经按升序 <strong>排列</strong></li>
</ul>
---
[提交记录](https://leetcode.cn/problems/remove-duplicates-from-sorted-list/submissions/) | [题解](https://leetcode.cn/problems/remove-duplicates-from-sorted-list/solution/)
Solutions & Notes
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