题目描述:
代码实现:
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* struct ListNode *next;
* };
*/
struct ListNode* reverseList(struct ListNode* head){
if(head==NULL)
return NULL;
struct ListNode* n1=NULL;
struct ListNode* n2=head;
struct ListNode* n3=head->next;
while(n2)
{
n2->next=n1;
n1=n2;
n2=n3;
if(n3!=NULL)
{
n3=n3->next;
}
}
return n1;
}