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leetcode:Search in Rotated Sorted Array II(duplicated)
题目要求:Follow up for "Search in Rotated Sorted Array":What ifduplicatesare allowed?Would this affect the run-time complexity? How and why?Write a functi...
分类:其他好文   时间:2015-03-09 20:36:53    阅读次数:163
Median of Two Sorted Arrays
There are two sorted arrays A and B of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be ...
分类:其他好文   时间:2015-03-09 15:52:47    阅读次数:92
leetcode Sort Listnode
Sort a linked list inO(nlogn) time using constant space complexity.findMiddle: 将listnode 不停的拆分sort: 将拆分好的不同的sortmerge: 将sort好的,向上merge/** * Definition...
分类:其他好文   时间:2015-03-08 07:50:33    阅读次数:128
LeetCode -- Merge k Sorted Lists (Divide and Conquer / PriorityQueue)
Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. 分支策略:每次归并两个已排好序的链表,直至只剩下一个链表。 public class Solution { public ListNode mergeKLists(List list...
分类:其他好文   时间:2015-03-05 19:33:56    阅读次数:138
[Leetcode]
Sort a linked list in O(n log n) time using constant space complexity. 链表排序,O(nlgn)的复杂度,应该是归并或者快排,对链表来说归并应该用起来更顺手一些,尤其是对归并的步骤来说,链表这种数据结构真是再合适不过了。这里我用了递归调用来实现归并步骤,效率可能略微低那么一点点,但是代码简洁得不得了哇~~ 归并排序是分治...
分类:其他好文   时间:2015-03-03 22:18:35    阅读次数:160
转 算法复杂度分析
转自http://www.cnblogs.com/gaochundong/p/complexity_of_algorithms.html为什么要进行算法分析?预测算法所需的资源计算时间(CPU 消耗)内存空间(RAM 消耗)通信时间(带宽消耗)预测算法的运行时间在给定输入规模时,所执行的基本操作数量...
分类:编程语言   时间:2015-03-02 18:13:19    阅读次数:220
LeetCode136——Single Number
Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using e...
分类:其他好文   时间:2015-02-27 11:58:37    阅读次数:169
LeetCode137——Single Number II
Given an array of integers, every element appears three times except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without u...
分类:其他好文   时间:2015-02-26 18:33:18    阅读次数:99
leetcode——Merge k Sorted Lists
题目: Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. 题意: 将k个已排好序的链表合并为一个非下降排序的链表。 思路: 将每个链表的表头元素取出来,...
分类:其他好文   时间:2015-02-26 11:24:57    阅读次数:145
LeetCode Search for a Range
Given a sorted array of integers, find the starting and ending position of a given target value. Your algorithm's runtime complexity must be in the order of O(log n). If the target is not found ...
分类:其他好文   时间:2015-02-25 21:10:33    阅读次数:163
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