Remove Duplicates from Sorted List

 1 /**
 2  * Definition for singly-linked list.
 3  * struct ListNode {
 4  *     int val;
 5  *     ListNode *next;
 6  *     ListNode(int x) : val(x), next(NULL) {}
 7  * };
 8  */
 9 class Solution {
10 public:
11     ListNode* deleteDuplicates(ListNode* head) {
12         if(!head || !(head->next)) return head;
13         
14         ListNode *temp = head;
15         ListNode *newHead = head;
16         
17         while(temp->next){
18             if(temp->val != temp->next->val){
19                 head->next = temp->next;
20                 head = head->next;
21             }
22             temp = temp->next;
23         }
24         head->next = NULL;
25         return newHead;
26     }
27 };