LeetCode-83-Remove Duplicates from Sorted List(链表)-Medium

/**
* Definition for singly-linked list.
* public class ListNode {
*     int val;
*     ListNode next;
*     ListNode(int x) { val = x; }
* }
*/
public class Solution {
public ListNode deleteDuplicates(ListNode head) {
ListNode curP=head;
ListNode preP=null;
int preVal=0;
while(curP!=null){
if(curP==head){
preVal=curP.val;
preP=curP;
curP=curP.next;
continue;
}

if(curP.val==preVal){
preP.next=curP.next;
curP=curP.next;
}else{
preP=curP;
preVal=curP.val;
curP=curP.next;
}
}

return head;
}
}