题解 | #质数因子#

import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;
import java.util.Set;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {

    private static List<Integer> list = new LinkedList<>();
    public static void main(String[] args) {

        int n = 0;
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            n = in.nextInt();
        }

        result(n);
    }

    private static void result(int n){

        find(n);

        list.forEach(i -> {
            System.out.print(i+" ");
        });
    }


    private static void find(int n){

        int temp = n;
        int max = n / 2 + 1;
        int muli = muli();
        for(int i = 2;i<max;i++){
            if(n == muli){
                return;
            }
            if(temp%i == 0){
                list.add(i);
                muli();
                temp = temp/i;
                max = temp/2 +1;
                i=1;
            }
            if(i == max-1){
                list.add(temp);
            }
        }
    }

    private static int muli(){
        int n = 1;
        for(Integer i : list){
            n *= i;
        }
        return n;
    }

}