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搜索关键字:calculate prime s    ( 3428个结果
USACO 1.5.3 SuperPrime Rib
The set of ribs denoted by 7331 is prime; the three ribs 733 are prime; the two ribs 73 are prime, and, of course, the last rib, 7, is prime. The nu.....
分类:其他好文   时间:2015-05-25 21:54:52    阅读次数:96
JUnit Test
这篇文章主要将要介绍JUnit测试工具的使用。本文中待测试的对象为一个简单的Calculate类,包括加(add),减(substract),乘(multiply),除(divide)四个简单的方法。 1 public class Calculate { 2 3 public st...
分类:其他好文   时间:2015-05-25 21:50:13    阅读次数:165
LeetCode Count Primes
Description:Count the number of prime numbers less than a non-negative number, n.思路分析:这题是一道数学题,求小于n的所有质数。容易想到的思路是定义个isPrime的判定函数,对小于n的数一个一个判定,但是时间复杂度O(N^2)。有没有更快的算法呢?有,这是一个经典的找质数的算法,Sieve of Eratosthe...
分类:其他好文   时间:2015-05-25 16:47:52    阅读次数:128
Calculate total energies on various inter-atomic distances and Run batch DFT and DFTB jobs
Change interatomic distance and Run DFT (Density Functional Theory, deMon2k code):#! /bin/bashfor n in `head -n 1 ../distances` do molecule=${1%....
分类:其他好文   时间:2015-05-25 16:12:45    阅读次数:97
1015. Reversible Primes (20)
题目如下: A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is al...
分类:其他好文   时间:2015-05-25 14:39:05    阅读次数:140
POJ 2739 Sum of Consecutive Prime Numbers
Sum of Consecutive Prime Numbers Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given positive integer have? For example, the integer 53 has two representation...
分类:其他好文   时间:2015-05-25 14:37:58    阅读次数:127
POJ题目2689 Prime Distance(任何区间素数筛选)
Prime Distance Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 13459   Accepted: 3578 Description The branch of mathematics called number theory is about prope...
分类:其他好文   时间:2015-05-23 11:31:57    阅读次数:127
HDU1016——Prime Ring Problem
http://acm.hdu.edu.cn/showproblem.php?pid=1016这道题是经典的素数环问题,相邻的两个数之和是素数。解题方法:用的是深搜,以1为起点,搜索,下一个数为出去前面的数字的集合。(用vis数组记录访问过的节点)剪枝:当前搜索值与数组前一个值之和不为素数的时候返回。...
分类:其他好文   时间:2015-05-23 06:23:53    阅读次数:155
Friend
Description On an alien planet, every extraterrestrial is born with a number. If the sum of two numbers is a prime number, then two extraterrestrials can be friends. But every extraterrestrial ca...
分类:其他好文   时间:2015-05-22 09:43:20    阅读次数:161
JUnit4安装使用报告
新建了一个Java项目,添加了一个calculate.java的class,随后,将JUnit4引入该项目生成JUnit测试框架:在Eclipse的Package Explorer中用右键点击该类弹出菜单,选择“New à JUnit Test Case”随后在TestCaculate.java中为...
分类:其他好文   时间:2015-05-22 00:05:58    阅读次数:262
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