Given a sorted linked list, delete all duplicates such that each element appear only once.
For example,
Given 1->1->2, return 1->2.
Given 1->1->2->3->3, return 1->2->3.
简单的题目，直接上AC代码：
ListNode* deleteDuplicates(ListNode* head) { if(!head) return NULL; ListNode*fir = head; ListNode*sec = fir->next; while(sec) { if(fir->val == sec->val) { sec= sec->next; } else { fir->next = sec; fir = sec; sec= sec->next; } } fir->next = sec; return head; }
LeetCode【83】Remove Duplicates from Sorted List
原文：http://www.cnblogs.com/ww-jin/p/4488244.html