题目

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.

代码

 public static ListNode deleteDuplicates(ListNode head) {if (head==null || head.next==null) return head; ListNode first = head;ListNode second=head.next;while(second!=null){if(first.val==second.val){second=second.next;first.next=second;}                else{first=first.next;second=first.next;                      }}return head;}

代码下载：https://github.com/jimenbian/GarvinLeetCode

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