golang力扣leetcode 82.删除排序链表中的重复元素II

package leetcode
type ListNode struct {
  Val  int
  Next *ListNode
}
func deleteDuplicates(head *ListNode) *ListNode {
  cnt := &ListNode{}
  cnt.Next = head
  head = cnt
  for head.Next != nil && head.Next.Next != nil {
    if head.Next.Val == head.Next.Next.Val {
      rmVal := head.Next.Val
      for head.Next != nil && head.Next.Val == rmVal {
        head.Next = head.Next.Next
      }
    } else {
      head = head.Next
    }
  }
  return cnt.Next
}