Java求s=a+aa+aaa+aaaa+aa...a 5个数相加的值

import java.io.*;
public class Sumloop {
 public static void main(String[] args) throws IOException
 {
   int s=0;
   String output="";
   BufferedReader stadin = new BufferedReader(new InputStreamReader(System.in));
   System.out.println("请输入a的值");
   String input =stadin.readLine();
   for(int i =1;i<=Integer.parseInt(input);i++)
   {
     output+=input;
     int a=Integer.parseInt(output);
     s+=a;
   }
   System.out.println(s);
 }
}

import java.io.*;
public class Sumloop {
 public static void main(String[] args) throws IOException
 {
   int s=0;
   int n;
   int t=0;
   BufferedReader stadin = new BufferedReader(new InputStreamReader(System.in));
   String input = stadin.readLine();
   n=Integer.parseInt(input);
   for(int i=1;i<=n;i++){
    t=t*10+n;
    s=s+t;
    System.out.println(t);
   }
   System.out.println(s);
   }
}