singly-linked list----Two words to express it, brief yet powerful!
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Two words to express it, brief yet powerful!
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解题思路
此处撰写解题思路
代码
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode() {}
* ListNode(int val) { this.val = val; }
* ListNode(int val, ListNode next) { this.val = val; this.next = next; }
* }
*/
class Solution {
public static ListNode swapPairs(ListNode head) {
if(head==null||head.next==null) {
return head;
}
ListNode next = head.next;
head.next = swapPairs(next.next);
next.next = head;
return next;
}
}
标签:head,ListNode,val,int,powerful,express,list,next 来源: https://blog.csdn.net/qq_32662795/article/details/112725818