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[LeetCode]206. Reverse Linked List 链表反转

2016-09-22 10:58 399 查看
Reverse a singly linked list.

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代码如下:
ListNode* reverseList(ListNode* head) {
if(head==NULL||head->next==NULL)return head;
ListNode *res,*newnode;
res=head;
head=head->next;
res->next=NULL;
while(head)
{
ListNode *temp=res;
newnode=head;
head=head->next;
newnode->next=temp;
res=newnode;

}
return newnode;
}
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