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1091. Acute Stroke (30)
One important factor to identify acute stroke (急性脑卒中) is the volume of the stroke core. Given the results of image analysis in which the core regions ...
分类:其他好文   时间:2015-12-06 13:03:35    阅读次数:196
[LeetCode]Super Ugly Number
思路和ugly2一样,不过是变成了一组factor,用一个priority求出每次最小的,同时维护一个conut数组,记录每个factor走的次数有一个500000的过不了,超限了,无耻的写了一行作弊的代码public class Solution { public int nthSuperU...
分类:其他好文   时间:2015-12-03 09:54:41    阅读次数:119
254. Factor Combinations
题目:Numbers can be regarded as product of its factors. For example,8 = 2 x 2 x 2; = 2 x 4.Write a function that takes an integernand return all possib....
分类:其他好文   时间:2015-12-03 02:05:09    阅读次数:710
How much training data do you need?
How much training data do you need?The quality and amount of training data is often the single most dominant factor that determines the performance of...
分类:其他好文   时间:2015-11-29 21:16:57    阅读次数:300
UESTC 1246 拆x3
用归纳法分析可以知道死循环只有4。分析一下复杂度,如果n很大并且不是素数,根据基本不等式可以知道 sum factor(n)≥2+n/2≈ n/2。复杂度是O(T*logN*sqrt(N)),这个上界比较松。如果是用Pollard_rho再开个平方估计常数也差不多了。#includeusing na...
分类:其他好文   时间:2015-11-29 13:30:01    阅读次数:184
[LeetCode]Factor Combinations
这个题目比较要注意的一点是如何防止重复。在dfs中,下一层的因子应该大于等于上一层的public class Solution { List> result = new ArrayList>(); public List> getFactors(int n) { if (n...
分类:其他好文   时间:2015-11-26 17:10:15    阅读次数:162
因子分析 (Factor Analysis Sharp)
In my understanding, factor analysis is a method developed to avoid the mass estimation of the variance-covariance matrix when doing Markowitz Allocat...
分类:其他好文   时间:2015-11-20 21:43:19    阅读次数:194
iPhone屏幕尺寸、分辨率及适配
1.iPhone尺寸规格设备iPhone宽Width高Height对角线Diagonal逻辑分辨率(point)Scale Factor设备分辨率(pixel)PPI3GS2.4 inches (62.1 mm)4.5 inches (115.5 mm)3.5-inch320x480@1x320x4...
分类:其他好文   时间:2015-11-19 18:48:49    阅读次数:350
因子分析 (Factor Analysis Sharp)
In my understanding, factor analysis is a method developed to avoid the mass estimation of the variance-covariance matrix when doing Markowitz Allocat...
分类:其他好文   时间:2015-11-18 00:41:43    阅读次数:159
Two-factor Authentication (2FA)
Two-factor Authentication (2FA) 使用方式3种:1.Generating a code through a TOTP application2.Using a FIDO U2F security key3.Receiving a text message https:/...
分类:其他好文   时间:2015-11-13 06:15:30    阅读次数:471
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