Automorphic Number{Numbers}

import java.io.*;
class Automorphic_num
{
    public static void main(String args[])throws IOException
    {
        InputStreamReader reader = new InputStreamReader(System.in);
        BufferedReader input = new BufferedReader(reader);
        int n,sq,d,count=0,tsq;
        System.out.print("Enter a number : ");
        n = Integer.parseInt(input.readLine());
        sq = n * n;
        tsq=sq;
        do
        {
            d = tsq%10;
            count++;
            tsq = tsq/10;
        }while(tsq!=0);
        for(int i=2 ; i<=count ; i++)
        {
            if(i==count)
            {
                i--;
                i = (int)Math.pow(10,i);
                int ers = sq % i;
                if(ers == n)
                {
                    System.out.println("It is a automorphic number");
                    break;
                }
                else
                {
                    System.out.println("It is not a automorphic number");
                    break;
                }
            }
        }
    }
}