GFG Move Last Element to Front of a Linked List

class Solution{
public:
    ListNode *moveToFront(ListNode *head){
        if(head==NULL || head->next==NULL)
        return head;
        ListNode* curr=NULL;
        ListNode* prev=NULL;
        curr=head;
        while(curr->next)
        {
            prev=curr;
            curr=curr->next;
        }
        
        prev->next=NULL;
        curr->next=head;
        return curr;
        
    }
};