解题思路:
注意事项:
参考代码:
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner=new Scanner(System.in); Main main=new Main(); int n=scanner.nextInt(); int sum=0; for (int i = 2; i <=n; i++) { if (main.isFlag(i)){ sum+=i; } } System.out.println(sum); } public static boolean isFlag(int i) { if(i<2){return false;} for (int j = 2; j <=Math.sqrt(i); j++) { if (i%j==0) return false; } return true; } }
0.0分
2 人评分