码迷,mamicode.com
首页 >  
搜索关键字:reversible primes    ( 347个结果
LeetCode 204. Count Primes
Problem: https://leetcode.com/problems/count-primes/ Count the number of prime numbers less than a non-negative number, n. Thought: SieveofEratosthene ...
分类:其他好文   时间:2016-07-09 17:48:54    阅读次数:136
algorithm@ Sieve of Eratosthenes (素数筛选算法) & Related Problem (Return two prime numbers )
Sieve of Eratosthenes (素数筛选算法) Given a number n, print all primes smaller than or equal to n. It is also given that n is a small number. For example, ...
分类:编程语言   时间:2016-07-06 00:06:40    阅读次数:308
LeetCode 第 204 题 (Count Primes)
LeetCode 第 204 题 (Count Primes) Description: Count the number of prime numbers less than a non-negative number, n. 计算小于 N 的素数的个数。这道题目比较简单。但是想提高计算效率与需要费点脑筋。判断一个数字 nn 是不是素数的简单方法是 用 nn 去除 2,3,4,…,n?1...
分类:其他好文   时间:2016-07-03 19:45:17    阅读次数:212
Leetcode 204. Count Primes
题目概述: Description: Count the number of prime numbers less than a non-negative number, n. Credits:Special thanks to @mithmatt for adding this problem a ...
分类:其他好文   时间:2016-06-19 06:46:44    阅读次数:195
rails中两种回滚-reversible和revert区别
通常迁移内容写在change方法中 ,但是有些迁移内容不能自动通过执行rake:rollback回滚, 所以在迁移文件里要使用 reversible 方法,告诉rails如何回滚例如下面 class ExampleMigration < ActiveRecord::Migration def cha ...
分类:其他好文   时间:2016-06-17 17:19:58    阅读次数:424
204. Count Primes
...
分类:其他好文   时间:2016-06-09 12:17:44    阅读次数:179
【Leetcode】Count Primes
题目链接:https://leetcode.com/problems/count-primes/ 题目: Description: Count the number of prime numbers less than a non-negative number, n. 思路: 埃拉托色尼选筛法 算法: public int countPrimes...
分类:其他好文   时间:2016-06-02 13:49:18    阅读次数:132
LeetCode:Count Primes
Count Primes Total Accepted: 65068 Total Submissions: 263838 Difficulty: Easy Description: Count the number of prime numbers less than a non-negative number, n. Credits: S...
分类:其他好文   时间:2016-05-30 15:24:24    阅读次数:187
HDU 2161 Primes (素数筛选法)
题意:输入一个数判断是不是素数,并规定2不是素数。 析:一看就很简单吧,用素数筛选法,注意的是结束条件是n<0,一开始被坑了。。。 不说了,直接上代码: ...
分类:其他好文   时间:2016-05-22 22:55:59    阅读次数:272
neu 1694 Primorial vs LCM 数论
1694: Primorial vs LCM 题目描述 Given N (2<=N<=10^14), what is the quotient of LCM(1,2,3,....,N) divided by multiple of all primes up to N. As the result ...
分类:其他好文   时间:2016-05-13 14:08:23    阅读次数:119
347条   上一页 1 ... 15 16 17 18 19 ... 35 下一页
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!