//////////////////

import java.io.PrintWriter;

public abstract class Student {

// private member
private String name;
private int id;
private float gpa;

public Student(){
this.name="";
this.id=-1;
this.gpa=0;
}
public Student(String n,int i,float g){
this.name=n;
this.id=i;
this.gpa=g;
}

// print student in console
void printStudent(){
System.out.println("Name : "+this.name);
System.out.println("ID : "+this.id);
System.out.println("GPA : "+this.gpa);
}

// return id
public int getID(){
return(this.id);
}

// write in file
public void printStudent(PrintWriter output){
output.print(this.name);
output.print(","+this.id);
output.print(","+this.gpa);
}
}

/////////////

import java.io.PrintWriter;

public class UndergradStudent extends Student {
private boolean isTransfer;
public UndergradStudent(){
// call super class
super();
this.isTransfer=false;
}

// constructor with parameter
public UndergradStudent(String m,int i,float g,boolean b){

// call super class
super(m,i,g);
this.isTransfer=b;
}

// print in console
void printStudent(){
super.printStudent();
System.out.println("Under Graduate");
System.out.println("isTransfer : "+this.isTransfer);
}

// write in file
public void printStudent(PrintWriter output){
super.printStudent(output);
output.print(",undergraduate");
output.println(","+this.isTransfer);
}
}

//////////////////////

import java.io.PrintWriter;

public class GradStudent extends Student {
private String college;
public GradStudent(){
// call super class
super();
this.college="";
}

// constructor
public GradStudent(String m,int i,float g,String c){

// call super class
super(m,i,g);
this.college=c;
}
// print in console
void printStudent(){
super.printStudent();
System.out.println("Graduate");
System.out.println("College : "+this.college);
}

// write in file
public void printStudent(PrintWriter output){
super.printStudent(output);
output.print(",graduate");
output.println(","+this.college);
}
}

//////////////////


import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;


public class StdentDriver {
public static void main(String[] args) throws FileNotFoundException, IOException {


if(args.length!=2){
System.out.println("Error in input\n<input file name> <output file name>");
return;
}



FileReader f = new FileReader(args[0]);
BufferedReader b = new BufferedReader(f);
String line="";
ArrayList<Student> students=new ArrayList<Student>();

// input from file
while((line=b.readLine())!=null){
String [] spt=line.split(",");

if(spt[3].equals("graduate")==true){
students.add(new GradStudent(spt[0],Integer.parseInt(spt[1]),Float.parseFloat(spt[2]),spt[4]));
}
if(spt[3].equals("undergraduate")==true){
students.add(new UndergradStudent(spt[0],Integer.parseInt(spt[1]),Float.parseFloat(spt[2]),Boolean.parseBoolean(spt[4])));
}
}
b.close();



System.out.println("Readding Input Complete");
System.out.println("Print in file and console");

// output to file
FileWriter writer= new FileWriter(args[1]);
PrintWriter outWriter = new PrintWriter(writer);

for(int i=students.size()-1;i>=0;i--){
System.out.println("\nRecord "+(students.size()-i));

// get instance of object
if(students.get(i) instanceof UndergradStudent){
UndergradStudent s=(UndergradStudent) students.get(i);
s.printStudent();
s.printStudent(outWriter);
}
if(students.get(i) instanceof GradStudent){
GradStudent s=(GradStudent) students.get(i);
s.printStudent();
s.printStudent(outWriter);
}
}

outWriter.close();
}

}