(Java) LeetCode 24. Swap Nodes in Pairs —— 兩兩交換鏈表中的節點
Given a linked list, swap every two adjacent nodes and return its head.
Example:
Given 1->2->3->4, you should return the list as 2->1->4->3.
Note:
- Your algorithm should use only constant extra space.
- You may not modify the values in the list‘s nodes, only nodes itself may be changed.
本題是兩個一組翻轉鏈表，類似LeetCode 206. Reverse Linked List —— 反轉鏈表。
(Java) LeetCode 24. Swap Nodes in Pairs —— 兩兩交換鏈表中的節點
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