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.

分析

当前结点与下一个结点值比较。

/** * 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 head;        ListNode* temp_head=head;        while(head->next!=NULL)        {            if(head->val==head->next->val)            {                head->next=head->next->next;            }            else                head=head->next;        }        return temp_head;    }};