题目链接:https://leetcode.com/problems/rotate-list/#/description
Given a list, rotate the list to the right by k places, where k is non-negative.
For example:
Given 1->2->3->4->5->NULL
and k = 2
,
return 4->5->1->2->3->NULL
.
class Solution {
public:
ListNode* rotateRight(ListNode* head, int k) {
if(!head)
return head;
int len=1;
ListNode* newH,*tail;
newH=tail=head;
while(tail->next)
{
tail=tail->next;
len++;
}
tail->next=head;
if(k%=len)
{
for(auto i=0;i<len-k;i++)
tail=tail->next;
}
newH=tail->next;
tail->next=NULL;
return newH;
}
};