题解 | #扭蛋机#

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 n = in.nextInt();
        String str = "";
        while(n > 0){
            if (n % 2 == 0){
                str += '3';
                n = (n - 2) / 2;
            }else {
                str += '2';
                n = (n - 1) / 2;
            }
        }   
        StringBuffer a = new StringBuffer();
        for (int i = str.length()-1; i >= 0; i--){
            a.append(str.charAt(i));
        }  
        System.out.println(a.toString());
    }
    
}