题目
链接：https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list
给定一个排序链表，删除所有重复的元素，使得每个元素只出现一次。
示例 1:
输入: 1->1->2
输出: 1->2
示例 2:
输入: 1->1->2->3->3
输出: 1->2->3
C++代码
/*** 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* p = head;while(p != NULL){ListNode* n = p->next;int dup_val = p->val;while(n != NULL && n->val == dup_val)n = n->next;p->next = n;p = n;}return head;}
};
执行用时: 12ms, 在所有 C++ 提交中击败了 74.74% 的用户
内存消耗: 13.2MB, 在所有 C++ 提交中击败了 5.06% 的用户
Python3代码
# Definition for singly-linked list.
# class ListNode:
# def __init__(self, x):
# self.val = x
# self.next = Noneclass Solution:def deleteDuplicates(self, head: ListNode) -> ListNode:p = headwhile(p != None):n = p.nextdup_val = p.valwhile(n != None and n.val == dup_val):n = n.nextp.next = np = nreturn head
)
