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更新图片链接

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kama
2025-05-19 17:11:04 +08:00
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problems/0024.两两交换链表中的节点.md Normal file → Executable file
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@@ -12,7 +12,7 @@
你不能只是单纯的改变节点内部的值，而是需要实际的进行节点交换。
<img src='https://code-thinking.cdn.bcebos.com/pics/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B9-%E9%A2%98%E6%84%8F.jpg' width=600 alt='24.两两交换链表中的节点-题意'> </img></div>
<img src='https://file1.kamacoder.com/i/algo/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B9-%E9%A2%98%E6%84%8F.jpg' width=600 alt='24.两两交换链表中的节点-题意'> </img></div>
## 算法公开课
@@ -31,16 +31,16 @@
初始时，cur指向虚拟头结点，然后进行如下三步：
![24.两两交换链表中的节点1](https://code-thinking.cdn.bcebos.com/pics/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B91.png)
![24.两两交换链表中的节点1](https://file1.kamacoder.com/i/algo/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B91.png)
操作之后，链表如下：
![24.两两交换链表中的节点2](https://code-thinking.cdn.bcebos.com/pics/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B92.png)
![24.两两交换链表中的节点2](https://file1.kamacoder.com/i/algo/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B92.png)
看这个可能就更直观一些了：
![24.两两交换链表中的节点3](https://code-thinking.cdn.bcebos.com/pics/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B93.png)
![24.两两交换链表中的节点3](https://file1.kamacoder.com/i/algo/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B93.png)
对应的C++代码实现如下： （注释中详细和如上图中的三步做对应）
@@ -81,7 +81,7 @@ public:
心想应该没有更好的方法了吧，也就 $O(n)$ 的时间复杂度，重复提交几次，这样了：
![24.两两交换链表中的节点](https://code-thinking.cdn.bcebos.com/pics/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B9.png)
![24.两两交换链表中的节点](https://file1.kamacoder.com/i/algo/24.%E4%B8%A4%E4%B8%A4%E4%BA%A4%E6%8D%A2%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B9.png)
力扣上的统计如果两份代码是 100ms 和 300ms的耗时，其实是需要注意的。