package main
import . "nc_tools"
/*
* type ListNode struct{
* Val int
* Next *ListNode
* }
*/
/**
*
* @param head ListNode类
* @return ListNode类
*/
func deleteDuplicates( head *ListNode ) *ListNode {
// write code here
cur := head
for cur != nil {
next := cur.Next
for next != nil && cur.Val == next.Val {
next = next.Next
cur.Next = next
}
cur = next
}
return head
}