83. Remove Duplicates from Sorted List

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.

含义：从已经排好序的列表中，删除重复值节点

    public ListNode deleteDuplicates(ListNode head) {
        ListNode curNode=head;
        while (curNode != null && curNode.next != null)
        {
            if (curNode.val == curNode.next.val)
            {
                curNode.next = curNode.next.next;
            }else
            {
                curNode = curNode.next;
            }
        }
        return head;    
    }