[LeetCode]: 83: Remove Duplicates from Sorted List

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.

 

思路与分析：直接遍历

 

代码：

    public static ListNode deleteDuplicates(ListNode head) {
        if(head == null){
            return null;
        }
        
        int intFlag = head.val;
        //ListNode listCurrent = head.next;
        ListNode listCurrent = head;
        
        
        while(listCurrent.next != null){
            if(intFlag == listCurrent.next.val){
                if(listCurrent.next.next != null){
                    listCurrent.next = listCurrent.next.next;
                }
                else{
                    listCurrent.next = null;
                }
            }
            else{
                intFlag = listCurrent.next.val;
                listCurrent = listCurrent.next;
            }
            
            
        }

        return head;
    }