DescriptionCurrent work in cryptography involves (among other things) large prime numbers and computing powers of numbers among these primes. Work in ...
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其他好文 时间：
2015-03-04 14:19:10
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135
一、判断素数
可以写一个判断素数的谓词函数，即从2开始枚举到sqrt(x)(包括)。但这里参数x不能过大，过大就会因为i*i乘积过大溢出。
Code：
{CSDN:CODE:609701}
后面的内容都是基于这个函数。
二、构造素数表
//构造素数表
int cnt=0;
int prime[n+1];
for(int i=2;i<=n;++i)
if(is_prime(i...
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其他好文 时间：
2015-03-01 11:55:56
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144
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 also a pr...
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其他好文 时间：
2015-02-28 21:46:29
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187
素数判断:一、根据素数定义，该数除了1和它本身以外不再有其他的因数。详见代码。1 int prime()2 {3 for (int i=2; i*i 2 #include 3 #include 4 5 using namespace std; 6 7 int hash[20050];...
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其他好文 时间：
2015-02-28 18:08:32
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206
Given any positive integer N, you are supposed to find all of its prime factors, and write them in the format N = p1^k1* p2^k2*…*pm^km.Input Specifica...
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其他好文 时间：
2015-02-27 16:57:44
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165
Happy 2006
Time Limit: 3000MS
Memory Limit: 65536K
Total Submissions: 9987
Accepted: 3434
Description
Two positive integers are said to be relatively prime to each ...
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移动开发 时间：
2015-02-26 09:59:22
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145
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 also a pr...
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其他好文 时间：
2015-02-25 21:10:58
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151
[转自]http://www.cnblogs.com/yuaqua/archive/2011/10/22/2219991.html1.在当前文件中引入命名空间这是我们最熟悉的用法，例如：using namespace std;2.在子类中使用 using 声明引入基类成员名称（参见C++ prime...
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编程语言 时间：
2015-02-25 11:36:17
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130
Problem Description
There are N (2<=N<=600) cities,each has a value of happiness,we consider two cities A and B whose value of happiness are VA and VB,if VA is a prime number,or VB is a prime number or (VA+VB) is a prime number,then they can be connected.W...
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其他好文 时间：
2015-02-25 09:10:52
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288
题目：Prime Ring ProblemTime Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 467 Accepted Submission(s): 297 Problem DescriptionA ring is compose of n circ...
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其他好文 时间：
2015-02-24 17:31:54
阅读次数：
224
