笔试题

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        StringBuffer num3=new StringBuffer();
        String num=scanner.next();
        StringBuffer num2=new StringBuffer(num);
        String[]nums=new String[num.length()];
        if(num.charAt(0) == '-'){
            for (int i=1;i<num.length()+1 ;i++ ) {
                StringBuffer num1=new StringBuffer(num);
                
                num1.insert(i,5);
                nums[i-1]=num1.toString();

            }
        }else{
            for (int i=1;i<num.length()+1 ;i++ ) {
                StringBuffer num1=new StringBuffer(num);
                
                num1.insert(i,5);
                nums[i-1]=num1.toString();

            }
        }
        for(int j=0;j<nums.length-1;j++) {
            for(int k=0;k<nums.length-1;k++){
                if(Integer.parseInt(nums[k])<Integer.parseInt(nums[k+1])){
                    String temp=nums[k];
                    nums[k]=nums[k+1];
                    nums[k+1]=temp;
                }
            }
        }
        String t=nums[0];
        System.out.print(t);

    }
}