203.移除链表元素

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/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode() {}
 *     ListNode(int val) { this.val = val; }
 *     ListNode(int val, ListNode next) { this.val = val; this.next = next; }
 * }
 */
class Solution {
    public ListNode removeElements(ListNode head, int val) {
       ListNode dummy = new ListNode(-1);
       dummy.next = head;
       ListNode cur = dummy;

       while(cur.next != null){
        
        if(cur.next.val == val){
            cur.next=cur.next.next;
        }else {
            cur = cur.next;
        }

       }

       return dummy.next;

    }
}