[C语言][LeetCode][83]Remove Duplicates from Sorted List

题目

Remove Duplicates from Sorted List
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.

标签

Linked List

难度

简单

分析

题目意思是给定一个单链表，去除重复的节点，返回新链表。解题思路是，用一个临时指针指向list，如果p->val == p->next->val，则将p指针跳过p->next，指向p->next->next。

C代码实现

/** * Definition for singly-linked list. * struct ListNode { *     int val; *     struct ListNode *next; * }; */struct ListNode* deleteDuplicates(struct ListNode* head) {    struct ListNode * p;    p = head;    if(!head)        return NULL;    while(p && p->next)    {        if(p->val == p->next->val)            p->next = p->next->next;        else            p = p->next;    }    return head;    }