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LeetCode172:Factorial Trailing Zeroes
Given an integer n, return the number of trailing zeroes in n!.Note: Your solution should be in logarithmic time complexity.这道题需要在对数时间内求解阶乘中尾端0的个数。阶乘中0的个数是由各项因子中2和5的个数决定的,又由于阶乘是连续n的数的积,所以2的数目比5的数目多,故0的...
分类:其他好文   时间:2015-06-07 15:53:47    阅读次数:88
leetcode single number 及其扩展 (转)
Given an array of integers, every element appearstwiceexcept for one. Find that single one.Note:Your algorithm should have a linear runtime complexity...
分类:其他好文   时间:2015-06-06 13:18:38    阅读次数:123
Java for LeetCode 172 Factorial Trailing Zeroes
Given an integer n, return the number of trailing zeroes in n!.Note: Your solution should be in logarithmic time complexity.解题思路:计算n能达到的5的最大次幂,算出在这种情况...
分类:编程语言   时间:2015-06-06 07:56:09    阅读次数:203
Java for LeetCode 148 Sort List
Sort a linked list in O(n log n) time using constant space complexity.解题思路:归并排序、快速排序、堆排序都是O(n log n),由于优先级队列是用堆排序实现的,因此,我们使用优先级队列即可,JAVA实现如下: publi...
分类:编程语言   时间:2015-06-05 00:24:17    阅读次数:150
[LeetCode-JAVA] Median of Two Sorted Arrays
题目:There are two sorted arraysnums1andnums2of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity sho...
分类:编程语言   时间:2015-06-04 22:18:29    阅读次数:122
Leetcode 129 Sum Root to Leaf Numbers
/** * ID: 129 * Name: Sum Root to Leaf Numbers * Data Structure: * Time Complexity: * Space Complexity: * Tag: Tree * Difficult: Medium * Algorithm...
分类:其他好文   时间:2015-06-04 08:34:32    阅读次数:108
the solution of CountNonDivisible by Codility
question:https://codility.com/programmers/lessons/9 To solve this question , I get each element's divsors which appearing in input Array A using Sieve of Eratosthenes method. Time complexity is O...
分类:其他好文   时间:2015-06-03 23:32:45    阅读次数:156
Solution of Codility
Solution of Codilitycodility.com is another great place to improve your programming skill. Train myself , and record here.Lesson 1: Time Complexity Lesson 2: Counting Elements Lesson 3: Prefix Sums...
分类:其他好文   时间:2015-06-02 23:30:49    阅读次数:247
[LeetCode] #23 Merge k Sorted Lists
Mergeksorted linked lists and return it as one sorted list. Analyze and describe its complexity.本题是多链表融合,可以选择利用归并算法思想,两两链表融合后再归并,也可以一起融合。本文是一起融合的想法,利用...
分类:其他好文   时间:2015-06-02 13:19:13    阅读次数:106
LeetCode 137: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 using...
分类:其他好文   时间:2015-06-02 09:27:36    阅读次数:118
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