java 快速求素数

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package test ; import java.util.Scanner ; public class hello { public static void main(String [] args) { Scanner read = new Scanner(System.in); while(read.hasNext()) { String rr = read.next(); int maxn=Integer.parseInt(rr); boolean isprime[] = new bo…

UVA 10006 - Carmichael Numbers 数论（快速幂取模 + 筛法求素数）

Carmichael Numbers An important topic nowadays in computer science is cryptography. Some people even think that cryptography is the only important field in computer science, and that life would not matter at all without cryptography. Alvaro is one…

Java求素数时出现错误

Java求素数时出现错误 1.具体错误如下 No enclosing instance of type Prime is accessible. Must qualify the allocation with an enclosing instance of type Prime (e.g. x.new A() where x is an instance of Prime). 2.错误原因 class PrimNumber { public boolean isPrim(int a) { f…

筛法求素数Java

输出:一个集合S,表示1~n以内所有的素数 import java.util.Scanner; public class 筛法求素数 { public static void main(String[] args) { int n; Scanner sc = new Scanner(System.in); n = sc.nextInt(); int[] arr = new int[n]; for (int i = 2; i < n; i++) { arr[i] = i; } for (int i…

<转载>一般筛法和快速线性筛法求素数

素数总是一个比较常涉及到的内容,掌握求素数的方法是一项基本功. 基本原则就是题目如果只需要判断少量数字是否为素数,直接枚举因子2 ..N^(0.5) ,看看能否整除N. 如果需要判断的次数较多,则先用下面介绍的办法预处理. 一般的线性筛法首先先介绍一般的线性筛法求素数 void make_prime() { memset(prime, , sizeof(prime)); prime[]=false; prime[]=false; ; ; i<N; i++) if (prime[i]) { pr…

Java【基础学习】之暴力求素数【用数组返回】

Java[基础学习]之暴力求素数[用数组返回] */ import java.util.*; public class Main{ public static void main(String[] args) { Scanner sc=new Scanner(System.in); int n; n=sc.nextInt(); ]; ans=f(n); ;i<ans.length;i++) { ) { break; } System.out.print(ans[i]); System.out.p…