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[LintCode] Ugly Number 丑陋数
Write a program to check whether a given number is an ugly number`. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For ex ...
分类:其他好文   时间:2016-04-30 12:58:29    阅读次数:121
ACM 动态规划 D
Problem D Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ...
分类:其他好文   时间:2016-04-30 12:45:18    阅读次数:206
UVa 11292 - Dragon of Loowater(排序贪心)
Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem.The shores of Rellau Creek in central Loowater had always been a prime breeding ground for geese.Due to the la...
分类:编程语言   时间:2016-04-29 19:03:06    阅读次数:242
UVa 11292 - Dragon of Loowater(排序贪心)
Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem.The shores of Rellau Creek in central Loowater had always been a prime breeding ground for geese.Due to the la...
分类:编程语言   时间:2016-04-26 21:16:36    阅读次数:160
leetcode 204. Count Primes(线性筛素数)
Description: Count the number of prime numbers less than a non-negative number, n. 题解:就是线性筛素数的模板题。 ...
分类:其他好文   时间:2016-04-25 06:46:53    阅读次数:177
LeetCode 263
Ugly Number Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3 ...
分类:其他好文   时间:2016-04-25 00:40:09    阅读次数:148
【BZOJ-3667】Rabin_Miller算法 随机化判素数
3667: Rabin-Miller算法 Description Input 第一行:CAS,代表数据组数(不大于350),以下CAS行,每行一个数字,保证在64位长整形范围内,并且没有负数。你需要对于每个数字:第一,检验是否是质数,是质数就输出Prime 第二,如果不是质数,输出它最大的质因子是哪 ...
分类:编程语言   时间:2016-04-24 12:38:48    阅读次数:269
Prime Ring Problem
Problem Description A ring is compose of n circles as shown in diagram. Put natural number 1, 2, ..., n into each circle separately, and the sum of nu ...
分类:其他好文   时间:2016-04-24 00:48:51    阅读次数:223
POJ_2739_Sum_of_Consecutive_Prime_Numbers
描述 多次询问,对于一个给定的n,求有多少组连续的素数,满足连续素数之和为n. 分析 尺取法. 打个素数表,对于每一个n,尺取之. 换了种尺取法的写法= =. 1 #include<cstdio> 2 3 const int maxn=10005; 4 int p,n; 5 int prime[ma ...
分类:其他好文   时间:2016-04-23 10:27:57    阅读次数:187
机器学习算法笔记1_2:分类和逻辑回归(Classification and Logistic regression)
形式: 采用sigmoid函数:g(z)=11+e?zg(z)=\frac{1}{1+e^{-z}} 其导数为g′(z)=(1?g(z))g(z)g^\prime(z)=(1-g(z))g(z) 假设: 即: 若有m个样本,则似然函数形式是: 对数形式: 采用梯度上升法求其最大值 求导: 更新规则为: 可以发现,则个规则形式上和LMS更新规则是一样...
分类:编程语言   时间:2016-04-22 19:32:34    阅读次数:314
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