[LeetCode] 83. Remove Duplicates from Sorted List ☆(从有序数组中删除重复项)

描述

Given a sorted linked list, delete all duplicates such that each element appear only once.

Example 1:

Input: 1->1->2
Output: 1->2
Example 2:

Input: 1->1->2->3->3
Output: 1->2->3

有序链表去重。

解析

移除给定有序链表的重复项,那么我们可以遍历这个链表,每个结点和其后面的结点比较,如果结点值相同了,我们只要将前面结点的next指针跳过紧挨着的相同值的结点,指向后面一个结点。这样遍历下来,所有重复的结点都会被跳过,留下的链表就是没有重复项的了。

代码

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode(int x) { val = x; }
 * }
 */
class Solution {
    //me
    public ListNode deleteDuplicates(ListNode head) {
        if (null == head) {
            return head;
        }
        ListNode cur = head;
        ListNode next = cur.next;
        while (cur != null && next != null) {
            while (next != null && cur.val == next.val) {
                cur.next = next.next;
                next = next.next;
            }
            cur = cur.next;
        }
        return head;
    }
}

相似问题:删除链表中的重复节点 (难一点)

原文地址:https://www.cnblogs.com/fanguangdexiaoyuer/p/10777216.html

时间: 2024-12-09 22:26:24

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