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[Codility] CommonPrimeDivisors
Aprimeis a positive integer X that has exactly two distinct divisors: 1 and X. The first few prime integers are 2, 3, 5, 7, 11 and 13.A prime D is cal...
分类:其他好文   时间:2015-04-28 20:28:10    阅读次数:263
LeetCode-204 Count Primes
Count the number of prime numbers less than a non-negative number,n题意:求小于n的所有素数的个数。思路:1. 范围在1~n-1,求先把2的倍数删除,再把3的倍数删除,再把5的倍数删除。。。每次都把集合中最小元素的倍数删除,多次循环之...
分类:其他好文   时间:2015-04-28 17:52:50    阅读次数:112
[LeetCode] Count Primes 质数的个数
Description:Count the number of prime numbers less than a non-negative number,nclick to show more hints.References:How Many Primes Are There?Sieve of ...
分类:其他好文   时间:2015-04-28 15:35:41    阅读次数:144
[LeetCode] Count Primes
Description: Count the number of prime numbers less than a non-negative number, n解题思路采用Eratosthenes筛选法,依次分别去掉2的倍数,3的倍数,5的倍数,……,最后剩下的即为素数。实现代码class Solution { public: int countPrimes(int n) {...
分类:其他好文   时间:2015-04-28 11:54:15    阅读次数:114
[Leetcode] Count Primes
Description:Count the number of prime numbers less than a non-negative number,nHint:The number n could be in the order of 100,000 to 5,000,000.click t...
分类:其他好文   时间:2015-04-27 23:37:49    阅读次数:147
Count Primes
Description:Count the number of prime numbers less than a non-negative number,nHint:The number n could be in the order of 100,000 to 5,000,000.C++实现代码...
分类:其他好文   时间:2015-04-27 21:22:18    阅读次数:92
Leetcode Count Prime
Description:Count the number of prime numbers less than a non-negative number,nHint:The number n could be in the order of 100,000 to 5,000,000.#define...
分类:其他好文   时间:2015-04-27 19:46:35    阅读次数:100
leetcode - Count Primes
leetcode -https://leetcode.com/problems/count-primes/Q:Description:Count the number of prime numbers less than a non-negative number,nHint:The number ...
分类:其他好文   时间:2015-04-27 18:10:59    阅读次数:230
编程珠玑(续) 读书笔记 -(前言+第一章性能监视工具)
《ACM通讯》一次一章,仔细地读ANSIAmerican National Standards Institute 美国国家标准学会1.1计算素数#includeint prime(int n ){ int i; for(i =2;i#includeint root(int n ){ ...
分类:其他好文   时间:2015-04-27 12:53:41    阅读次数:129
1 UVA 10789 Prime Frequency
先筛素数,再统计给定字符的出现频率。 #include #include using namespace std; bool pri[2010]; char s[2010]; void init() { int i,j; memset(pri,1,sizeof pri); pri[0]=pri[1]=0; for(i=2;i<=2000;i++) ...
分类:其他好文   时间:2015-04-26 22:56:21    阅读次数:264
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