题目: Sort a linked list inO(nlogn) time using
constant space complexity.解题思路: 复杂度为O(n* logn)
的排序算法有:快速排序、堆排序、归并排序。对于链表这种数据结构,使用归并排序比较靠谱。递归代码如下:代码: /...
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其他好文 时间:
2014-05-16 05:49:04
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266
题目: Sort a linked list using insertion sort.解题思路:
假设 list[1..i]是排好序的,找到第i+1个元素应该插入的位置及其前驱,然后将其插入。代码: /** * Definition for
singly-linked list. * str...
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其他好文 时间:
2014-05-16 05:47:08
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258
题目: Given a linked list, determine if it has a
cycle in it. Follow up: Can you solve it without using extra space?解题思路:
使用快慢指针,快指针每次走两步,慢指针每次走一步...
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其他好文 时间:
2014-05-16 05:19:21
阅读次数:
271
题目: Given a linked list, return the node where the
cycle begins. If there is no cycle, returnnull. Follow up: Can you solve it
without using extr...
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其他好文 时间:
2014-05-16 04:50:13
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329
A linked list is given such that each node
contains an additional random pointer which could point to any node in the list
or null.Return a deep copy ...
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其他好文 时间:
2014-05-15 21:00:06
阅读次数:
325
题意:判断一个链表中是否有环
思路:快慢指针,如果有环,最终快慢指针会在非NULL相遇
注:用到fast->next前先要确保fast非NULL,要用fast->next->next前先要确保fast,fast->next非NULL
复杂度:时间O(n), 空间O(1)
相关题目:Linked List CycleII...
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其他好文 时间:
2014-05-15 07:01:57
阅读次数:
219
【题目】
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list.
Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)
Out...
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其他好文 时间:
2014-05-15 05:13:49
阅读次数:
306
Linked List Cycle
Total Accepted: 17148 Total
Submissions: 49300My Submissions
Given a linked list, determine if it has a cycle in it.
Follow up:
Can you solve it without using extra sp...
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其他好文 时间:
2014-05-15 00:13:50
阅读次数:
279
Linked List CycleGiven a linked list, determine
if it has a cycle in it.Follow up:Can you solve it without using extra
space?做完Linked List Cycle II在做这...
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其他好文 时间:
2014-05-14 23:30:00
阅读次数:
399
在 O(nlogn)的时间内对一个链表进行排序。。明显是要用归并或者快排
第一次知道说原来归并也可以用链表来写,被刷了下三观。。。。。用快慢指针的方法找分界点。
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNod...
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其他好文 时间:
2014-05-14 15:03:49
阅读次数:
230