carloscn / carloscn/structstudy

leetcode-21:合并两个有序链表(merge-two-sorted-lists)

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Level-easy 一般问题 排序 链表
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Description

### 问题描述:

将两个升序链表合并为一个新的 升序 链表并返回。新链表是通过拼接给定的两个链表的所有节点组成的。
![image](https://user-images.githubusercontent.com/16836611/197369184-050c3a40-fd57-4da8-9be5-5ca15d895fa0.png)

```
输入:l1 = [1,2,4], l2 = [1,3,4]
输出:[1,1,2,3,4,4]
示例 2:

输入:l1 = [], l2 = []
输出:[]
示例 3:

输入:l1 = [], l2 = [0]
输出:[0]
```

提示:

```
两个链表的节点数目范围是 [0, 50]
-100 <= Node.val <= 100
l1 和 l2 均按 非递减顺序 排列
```

来源:力扣(LeetCode)
链接:https://leetcode.cn/problems/merge-two-sorted-lists

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