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leetcode No83. Remove Duplicates from Sorted List

时间:2016-08-07 14:08:36      阅读:178      评论:0      收藏:0      [点我收藏+]

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Question:

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.

Algorithm:

见程序

Accepted Code:

/**
 * 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||head->next==NULL)
            return head;
        ListNode* p=head;            //前
        while(p!=NULL&&p->next!=NULL)
        {
           ListNode *q=p->next;
           if(q->val==p->val)
           {
               p->next=q->next;
               delete q;
           }
           else 
           {
               p=p->next;
           }
        }
        return head;
    }
};


leetcode No83. Remove Duplicates from Sorted List

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原文地址:http://blog.csdn.net/u011391629/article/details/52142411

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