LeetCode Remove Duplicates from Sorted List

最新推荐文章于 2022-04-03 22:46:44 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。使用 C++ 实现，代码简洁高效。

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.

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