import java.io.*;
import java.util.*;
 
public class MainFourA 
{
    public static void main(String[] args)    
    {
        File[] filesOnComputer = File.listRoots(); 
 
            ArrayList listOfFiles = new ArrayList();
            System.out.println (filesOnComputer.length);
            for(int index = 0; index < filesOnComputer.length; index++)
            {
                listOfFiles.add((File)filesOnComputer[index]); 
                if(filesOnComputer[index].isDirectory())
                {
                    System.out.println ("here we are-"+filesOnComputer[index].getPath());
                    search((File)listOfFiles.get(index));
                }
                else
                System.out.println ("This is not the directory-"+filesOnComputer[index].getPath());
            }
        }
 
    public static void search(File f) 
    {
        try
        { 
            ArrayList<File> arrayList = new ArrayList<File>();
            ArrayList<File> arrayListAgain = new ArrayList<File>();
 
            File[] files= f.listFiles();    
            for(int index = 0; index < files.length; index++)
 
            if (files[index].isDirectory())
            {
                search(files[index]);
            }
 
            else if (files[index].isFile())
            {
 
                System.out.println ("here we are---" + files[index].getName());
 
                arrayList.add(files[index]);
                arrayListAgain.add(files[index]);
 
                if (arrayList.get(index).length() == arrayListAgain.get(index).length() && 
                arrayList.get(index).hashCode() != arrayListAgain.get(index).hashCode())
                {
 
                        System.out.println (arrayList.get(index).getName() + ", " + arrayList.get(index).length() + " bytes."); 
 
                }
    } 
 
 
            System.out.println (f.getName());
        }
            catch (Exception e)
            {
            }
        }
    }