PAT/PTA乙级1007素数对猜想题解

import java.util.*;
public class Main{
    public static void main(String args[]){
        Scanner in =new Scanner(System.in);
        int n=in.nextInt();
        in.close();
        int count=0;
        ArrayList list=new ArrayList();
        for(int i=2;i<=n;i++){
            if(isPrime(i)){list.add(i);}
        }
        for(int i=0;i