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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