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RotateList.cpp
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47 lines (42 loc) · 1.04 KB
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#include<iostream>
using namespace std;
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(head==NULL || head->next==NULL) {
return head;
}
int size=0;
ListNode *temp=head;
while(temp->next!=NULL) {
size++;
temp=temp->next;
}
size++;
temp->next=head;
ListNode *cur=head;
k=k%size;
for(int i=0;i<size-k-1;i++) {
cur=cur->next;
}
ListNode* res=cur;
res=res->next;
cur->next=NULL;
return res;
}
};
int main() {
ListNode *root=new ListNode(5);
root->next=new ListNode(7);
root->next->next=new ListNode(8);
Solution obj;
ListNode result=obj.rotateList(root,2);
return 0;
}