题目描述
输入一个链表,反转链表后,输出新链表的表头。
代码
/*
public class ListNode {
int val;
ListNode next = null;
ListNode(int val) {
this.val = val;
}
}*/
public class Solution {
public ListNode ReverseList(ListNode head) {
ListNode pHead = new ListNode(-1);
while(head != null)
{
ListNode t = new ListNode(head.val);
t.next = pHead.next;
pHead.next = t;
head = head.next;
}
return pHead.next;
}
}