题解 | #牛牛的二三七整除#

import java.util.Arrays;
import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        /*
        利用sort排序
        int a[] = new int[3];
        a[0] = num%2==0?2:0;
        a[1] = num%3==0?3:0;
        a[2] = num%7==0?7:0;
        Arrays.sort(a);
        int sum =0 ;
        for(int i=0;i<a.length;i++){
            if(a[i]!=0){
                System.out.printf("%d ",a[i]);
            }
            sum+=a[i];
        }
               if(sum==0){
                System.out.println("n");
               }
         */
        if( num%2!=0 && num%3!=0 && num%7!=0){
           System.out.print("n");
        }else{
            if(num%2==0){
                System.out.print(2+" ");
            }
            if(num%3==0){
                System.out.print(3+" ");
            }
             if(num%7==0){
                System.out.print(7+" ");
            }
        }
    }
}