[LeetCode]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         ListNode *prev = NULL;
13         for (ListNode *cur = head; cur != NULL; cur = cur->next) {
14             if (cur == head) {
15                 prev = cur;
16                 continue;
17             }
18             
19             if (cur->val == prev->val) {
20                 prev->next = cur->next;
21             } else {
22                 prev = cur;
23             }
24         }
25         
26         return head;
27     }
28 };