Remove Duplicates from Sorted List

最新推荐文章于 2023-01-13 08:10:00 发布

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本文介绍如何通过遍历排序链表并删除所有重复元素，确保每个元素仅出现一次。示例代码展示了具体实现过程。

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.

class Solution {
public:
    ListNode* deleteDuplicates(ListNode* head) {
        if(!head){
            return head;
        }
        ListNode * pPre = head;
        ListNode * pCur = NULL;
        while(pPre->next){
            pCur = pPre->next;
            if(pCur->val == pPre->val){
                pPre->next = pCur->next;
            }else{
                pPre = pCur;
            }
        }
        return head;
    }
};

class Solution {
public:
    ListNode* deleteDuplicates(ListNode* head) {
        if(!head){
            return head;
        }
        ListNode * pPre = head;
        ListNode * pCur = NULL;
        while(pPre && pPre->next){
            pCur = pPre->next;
            if(pCur->val == pPre->val){
                pPre->next = pCur->next;
            }else{
                pPre = pPre->next;
            }
        }
        return head;
    }
};