LeeTCode题解之Remove Duplicates from Sorted List

 1 ListNode* deleteDuplicates(ListNode* head) {
 2        if( head == NULL )
 3            return NULL;
 4        ListNode* p = head;
 5        while( p != NULL ){
 6         ListNode* pm = p;
 7            while( pm != NULL && pm->val == p->val ){
 8                pm = pm->next ;
 9            }
10            p->next = pm ;
11            p = p->next;
12        }
13         
14         
15         return head;
16     }