LeetCode刷题笔记（链表）：remove-duplicates-from-sorted-list

Love The Way You Lie 2022-06-01 01:57 97阅读 0赞

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*  **转载请注明作者和出处：[http://blog.csdn.net/u011475210][http_blog.csdn.net_u011475210]**
 *  **代码地址：[https://github.com/WordZzzz/Note/tree/master/LeetCode][https_github.com_WordZzzz_Note_tree_master_LeetCode]**
 *  **刷题平台：[https://www.nowcoder.com/ta/leetcode][https_www.nowcoder.com_ta_leetcode]**
 *  **题  库：Leetcode经典编程题**
 *  **编  者：WordZzzz**

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*   *  题目描述
     *  解题思路
     *  C版代码实现

## 题目描述 ##

Given a sorted linked list, delete all duplicates such that each element appear only once.

For example,  
Given1->1->2, return1->2.  
Given1->1->2->3->3, return1->2->3.

## 解题思路 ##

简单问题不要想的太复杂，直接嵌套循环搞定喽。外循环用来遍历链表，内循环用来遍历重复元素，如果重复就一直传递指针。

## C++版代码实现 ##

/**
     * Definition for singly-linked list.
     * struct ListNode {
     *     int val;
     *     ListNode *next;
     *     ListNode(int x) : val(x), next(NULL) {}
     * };
     */
    class Solution {
    public:
        ListNode *deleteDuplicates(ListNode *head) {
            if(head == NULL)
                return NULL;
            ListNode *dummy = head;
            while(dummy != NULL){
                while(dummy->next != NULL && dummy->val == dummy->next->val){
                    dummy->next = dummy->next->next;
                }
                dummy = dummy->next;
            }
            return head;
        }
    };

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[http_blog.csdn.net_u011475210]: http://blog.csdn.net/u011475210
[https_github.com_WordZzzz_Note_tree_master_LeetCode]: https://github.com/WordZzzz/Note/tree/master/LeetCode
[https_www.nowcoder.com_ta_leetcode]: https://www.nowcoder.com/ta/leetcode