Java一重循环解法

1import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        boolean flag=false;
        for(int i=10000;i<=99999;i++){
            StringBuilder sb=new StringBuilder();
            Integer k=Integer.parseInt(sb.append(i).reverse().toString());
            int g=i%10;
            int s=i/10%10;
            int b=i/100%10;
            int q=i/1000%10;
            int w=i/10000;
            if(k==i&&n==g+s+b+q+w){
                System.out.println(i);
                flag=true;
            }
        }
        for(int i=100000;i<=999999;i++){
            StringBuilder sb=new StringBuilder();
            Integer k=Integer.parseInt(sb.append(i).reverse().toString());
            int g=i%10;
            int s=i/10%10;
            int b=i/100%10;
            int q=i/1000%10;
            int w=i/10000%10;
            int sw=i/100000;
            if(k==i&&n==g+s+b+q+w+sw){
                System.out.println(i);
                flag=true;
            }
        }
        if(!flag){
            System.out.println(-1);
        }
    }
}