题目:
Given an integer n, return the number of trailing zeroes in n!.
Note: Your solution should be in logarithmic time complexity.
思路:
我们要计算 N! 中有多少个后导0.
我们来找一下规律,考虑n!的质数因子。后缀0,只有可能是质因子2...
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编程语言 时间:
2015-01-11 16:16:18
阅读次数:
272
题目Pascal's Triangle II通过率29.8%难度EasyGiven an indexk, return thekthrow of the Pascal's triangle.For example, givenk= 3,Return[1,3,3,1].Note:Could you o...
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其他好文 时间:
2015-01-10 11:09:53
阅读次数:
169
https://oj.leetcode.com/problems/compare-version-numbers/http://blog.csdn.net/u012243115/article/details/41969181publicclassSolution{
publicintcompareVersion(Stringversion1,Stringversion2){
if(version1==null||version2==null)
return0;//Invalidinput.
//NOTE!..
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其他好文 时间:
2015-01-09 19:31:02
阅读次数:
164
Construct Binary Tree from Preorder and Inorder TraversalGiven preorder and inorder traversal of a tree, construct the binary tree.Note:You may assume...
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其他好文 时间:
2015-01-09 18:46:57
阅读次数:
151
Construct Binary Tree from Inorder and Postorder TraversalGiven inorder and postorder traversal of a tree, construct the binary tree.Note:You may assu...
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其他好文 时间:
2015-01-09 15:29:53
阅读次数:
115
Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d =
target? Find all unique quadruplets in the array which gives the sum of target.
Note:
Element...
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其他好文 时间:
2015-01-09 09:17:54
阅读次数:
180
The problem:Two elements of a binary search tree (BST) are swapped by mistake.Recover the tree without changing its structure.Note:A solution using O(...
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其他好文 时间:
2015-01-09 06:54:36
阅读次数:
132
Given an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.Credits:Special thanks to@tsf...
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其他好文 时间:
2015-01-09 00:00:03
阅读次数:
531
1.LDA主题模型 给定先验概率参数αβ,主题混合参数θ,集合主题z,集合词w的联合分布为 (1)2.variational inference1>variational distribution variational inference algorithm 介绍的variational 分...
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其他好文 时间:
2015-01-08 22:37:44
阅读次数:
420
SubsetsGiven a set of distinct integers, S, return all possible subsets.Note:Elements in a subset must be in non-descending order.The solution set mus...
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其他好文 时间:
2015-01-08 21:27:08
阅读次数:
361