添加 24两两交换链表中的节点 Kotlin实现

problems/0024.两两交换链表中的节点.md

@@ -228,6 +228,27 @@ var swapPairs = function (head) {
 };
 ```
 
+Kotlin:
+
+```kotlin
+fun swapPairs(head: ListNode?): ListNode? {
+    val dummyNode = ListNode(0).apply { 
+        this.next = head
+    }
+    var cur: ListNode? = dummyNode
+    while (cur?.next != null && cur.next?.next != null) {
+        val temp = cur.next
+        val temp2 = cur.next?.next?.next
+        cur.next = cur.next?.next
+        cur.next?.next = temp
+        cur.next?.next?.next = temp2
+        cur = cur.next?.next
+    }
+    return dummyNode.next
+}
+```
+
+
 
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 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)