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...
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其他好文 时间:
2015-04-28 20:28:10
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263
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...
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其他好文 时间:
2015-04-28 17:52:50
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112
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 ...
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其他好文 时间:
2015-04-28 15:35:41
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144
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) {...
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其他好文 时间:
2015-04-28 11:54:15
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114
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...
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其他好文 时间:
2015-04-27 23:37:49
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147
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...
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其他好文 时间:
2015-04-27 21:22:18
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92
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...
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其他好文 时间:
2015-04-27 19:46:35
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100
leetcode -https://leetcode.com/problems/count-primes/Q:Description:Count the number of prime numbers less than a non-negative number,nHint:The number ...
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其他好文 时间:
2015-04-27 18:10:59
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230
《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 ){ ...
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其他好文 时间:
2015-04-27 12:53:41
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129
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++)
...
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其他好文 时间:
2015-04-26 22:56:21
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264