首页 > 代码库 > Remove Duplicates from Sorted List II
Remove Duplicates from Sorted List II
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list.For example,Given 1->2->3->3->4->4->5, return 1->2->5.Given 1->1->1->2->3, return 2->3.
难度:70,参考,现在要把前驱指针指向上一个不重复的元素中,如果找到不重复元素,则把前驱指针知道该元素,否则删除此元素。算法只需要一遍扫描,时间复杂度是O(n),空间只需要几个辅助指针,是O(1)
1 /** 2 * Definition for singly-linked list. 3 * public class ListNode { 4 * int val; 5 * ListNode next; 6 * ListNode(int x) { 7 * val = x; 8 * next = null; 9 * }10 * }11 */12 public class Solution {13 public ListNode deleteDuplicates(ListNode head) {14 ListNode dummy = new ListNode(-1);15 dummy.next = head;16 ListNode cur = head;17 ListNode run = dummy;18 while (cur != null) {19 while (cur.next != null && run.next.val == cur.next.val) {20 cur = cur.next;21 }22 if (run.next == cur) {23 run = run.next;24 }25 else {26 run.next = cur.next;27 }28 cur = cur.next;29 }30 return dummy.next;31 }32 }
Remove Duplicates from Sorted List II
声明:以上内容来自用户投稿及互联网公开渠道收集整理发布,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任,若内容有误或涉及侵权可进行投诉: 投诉/举报 工作人员会在5个工作日内联系你,一经查实,本站将立刻删除涉嫌侵权内容。