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61.cpp
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39 lines (39 loc) · 923 Bytes
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/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode() : val(0), next(nullptr) {}
* ListNode(int x) : val(x), next(nullptr) {}
* ListNode(int x, ListNode *next) : val(x), next(next) {}
* };
*/
class Solution {
public:
ListNode* rotateRight(ListNode* head, int k) {
if(!k || !head) return head;
ListNode* temp,*resultList;
int size=0;
temp=head;
while(temp!=NULL){
size+=1;
temp=temp->next;
}
temp=head;
k%=size;
if(!k) return head;
size-=(k+1);
while(size){
temp=temp->next;
size--;
}
resultList=temp->next;
temp->next=NULL;
temp=resultList;
while(temp->next!=NULL){
temp=temp->next;
}
temp->next=head;
return resultList;
}
};