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Update 0024.交换链表节点,添加C#版
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@ -459,6 +459,40 @@ impl Solution {
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}
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```
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### C#
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```C#
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// 虚拟头结点
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public ListNode SwapPairs(ListNode head)
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{
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var dummyHead = new ListNode();
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dummyHead.next = head;
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ListNode cur = dummyHead;
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while (cur.next != null && cur.next.next != null)
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{
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ListNode tmp1 = cur.next;
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ListNode tmp2 = cur.next.next.next;
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cur.next = cur.next.next;
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cur.next.next = tmp1;
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cur.next.next.next = tmp2;
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cur = cur.next.next;
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}
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return dummyHead.next;
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}
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```
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``` C#
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// 递归
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public ListNode SwapPairs(ListNode head)
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{
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if (head == null || head.next == null) return head;
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var cur = head.next;
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head.next = SwapPairs(head.next.next);
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cur.next = head;
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return cur;
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}
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```
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<p align="center">
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<a href="https://programmercarl.com/other/kstar.html" target="_blank">
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<img src="../pics/网站星球宣传海报.jpg" width="1000"/>
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