203. Remove Linked List Elements

class Solution {public:    ListNode* removeElements(ListNode* head, int val) {        ListNode* Head=new ListNode(-1);        Head->next=head;        ListNode* cur=head,*pre=Head;        while(cur)        {            if(cur->val==val)            {                pre->next=cur->next;                delete cur;                cur=pre->next;            }            else            {                pre=cur;                cur=cur->next;            }        }        head=Head->next;        delete Head;        return head;    }    };