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Counting Sort
1. Counting Sort doesn't work for negative number.2. Counting Sort assumes that each element is SMALL INTEGER.3. Time Complexity is O(Maximum value - ...
分类:其他好文   时间:2015-02-03 01:53:09    阅读次数:130
[LeetCode]Add Two Numbers
Q: 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 ...
分类:其他好文   时间:2015-02-02 23:06:26    阅读次数:153
[11-1] adaboost DTree
main idea:用与权重成正比的概率sampling生成数据训练DTree,并同时生成权重 sampling模拟权重,adaboost: 原始的adaboost需要在每笔资料的err上加上权重u 由于使用这种方法,需要修改原DTree的算法过程,所以使用sampling代替 方法如下--- 数据...
分类:其他好文   时间:2015-02-02 21:21:23    阅读次数:195
Rotate List
Given a list, rotate the list to the right by k places, where k is non-negative. For example: Given 1->2->3->4->5->NULL and k = 2, return 4->5->1->2->3->NULL. 解题思路:一开始想到比较简单的方法是用哈希,建立一个索引与结点的m...
分类:其他好文   时间:2015-02-02 18:15:45    阅读次数:122
【leetcode】Trapping Rain Water(hard)
Givennnon-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining.Fo...
分类:移动开发   时间:2015-02-02 17:34:58    阅读次数:282
[leetcode] Trapping Rain Water
Givennnon-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining.Fo...
分类:移动开发   时间:2015-02-02 14:04:12    阅读次数:196
随机采样方法整理与讲解(MCMC、Gibbs Sampling等)
随机模拟也可以叫做蒙特卡罗模拟(Monte Carlo Simulation)。这个方法的发展始于20世纪40年代,和原子弹制造的曼哈顿计划密切相关。随机模拟中有一个重要的问题就是给定一个概率分布p(x),我们如何在计算机中生成它的样本。
分类:其他好文   时间:2015-02-01 23:02:33    阅读次数:440
【leetcode】Largest Number
Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330. Note: The result may be ve...
分类:其他好文   时间:2015-02-01 20:28:26    阅读次数:174
LeetCode[Array]: Trapping Rain Water
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining.  For example,  Given [0,1,0,2,1,0,1,3,2,1,2,1],...
分类:移动开发   时间:2015-02-01 17:48:15    阅读次数:191
spark MLlib 概念 2:Stratified sampling 层次抽样
定义:Instatistical surveys, when subpopulations within an overall population vary, it is advantageous to sample each subpopulation (stratum) independent...
分类:其他好文   时间:2015-02-01 17:25:53    阅读次数:251
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