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AC代码:
1 import java.util.Scanner; 2 3 public class Main { 4 5 public static void main(String[] args) { 6 7 preprocess(); 8 9 Scanner sc=new Scanner(System.in); 10 11 int times=sc.nextInt(); 12 while(times-->0){ 13 int n=sc.nextInt(); 14 int ans=0; 15 while(n-->0){ 16 int t=sc.nextInt(); 17 if(prime[t]) ans+=t; 18 } 19 System.out.println(ans); 20 } 21 } 22 23 private static boolean prime[]=new boolean[1001]; 24 25 public static void preprocess(){ 26 for(int i=2;i<prime.length;i++){ 27 prime[i]=true; 28 } 29 for(int i=2;i<prime.length;i++){ 30 if(prime[i]){ 31 for(int j=i*2;j<prime.length;j+=i){ 32 prime[j]=false; 33 } 34 } 35 } 36 } 37 38 }
题目来源: http://acm.nyist.net/JudgeOnline/problem.php?pid=22
素数求和问题
时间: 2024-10-10 06:20:41