力扣 中等 82.删除排序链表中的重复元素 II
class Solution {
public ListNode deleteDuplicates(ListNode head) {
ListNode dummy = new ListNode(101, head);
ListNode cur = dummy;
while (cur.next != null && cur.next.next != null) {
int val = cur.next.val;
if (cur.next.next.val == val) {
while (cur.next != null && cur.next.val == val) {
cur.next = cur.next.next;
}
} else {
cur = cur.next;
}
}
return dummy.next;
}
}