/**
 * This class represents University and contains it's child domain classes(Course, Student, Sem, Department and Institute)
 */
package javacodes;

import java.util.*;

/**
 * This class is to represnt a Student
 *
 */
class Students
{
    String name="";
    
    int roll=0;
    
    double cgpa=0.0;
    
    Students(String name,int roll,double cgpa)
    {
        this.name=name;
        
        this.roll=roll;
        
        this.cgpa=cgpa;
    }
    
    Students(){}
    //Student setter method
    void setstu(String name,int roll,double cgpa)
    {
        this.name=name;
        
        this.roll=roll;
        
        this.cgpa=cgpa;
    }
    //Student getter method
    void getstu()
    {
        System.out.println(name+"\t"+roll+"\t"+cgpa);
    }
}

/**
 * This class is to represent a Semester with containing students and other information
 *
 */
class Sem
{   
    ArrayList<Students> li;
    
    void setsem()
    {
        
    Scanner in=new Scanner(System.in);
    
    System.out.print("Enter number of Students in this Sem :");
    
    int n=in.nextInt();
    
    li=new ArrayList<Students>(n);
    
    String name;int roll;double cgpa;
    
    Students obj;
    
    for(int i=0;i<n;++i)
    {
        obj=new Students();
        
        System.out.println("Student "+(i+1)+" :");
        
        System.out.print("Enter name :");
        
        name=in.next();
        
        System.out.print("Enter roll :");
        
        roll=in.nextInt();
        
        System.out.print("Enter cgpa :");
        
        cgpa=in.nextDouble();
        
        obj.setstu(name, roll, cgpa);
        
        li.add(obj);
        
    }
    }
    void showsem()
    {
        System.out.println("Name\tRoll\tCGPA");
        
        for(Students i:li)
        {
            i.getstu();
        }
    }
}
/**
 * This class represnts a Course in a Institute
 *
 */
class Course
{
    String name;
    
     ArrayList<Sem> li;
     
     void setcourse()
     {
         Scanner in=new Scanner(System.in);
         
         System.out.println("Enter name of this Course :");
         
         name=in.next();
         
    System.out.print("Enter number of Sem in this Course :");
    
    int n=in.nextInt();
    
    li=new ArrayList<Sem>(n);
    
    Sem obj;
    for(int i=0;i<n;i++)
    {   
        obj=new Sem();
        
        System.out.println("\tSemester "+(i+1)+" :");
        
        obj.setsem();
        
        li.add(obj);
        
    }
     }
     void showcourse()
    {
        int c=1;
        
        System.out.println(name);
        
        for(Sem i:li)
        {
            System.out.println("\tSemester "+c);
            
            i.showsem();
            
            c++;
        }
    }
}
/**
 * This class represents a Department in a Institute
 *
 */
class Department
{
   String name;
   
     ArrayList<Course> li;
     
     void setdept()
     {
         Scanner in=new Scanner(System.in);
         
         System.out.println("Enter name of this Department :");
         
         name=in.nextLine();
         
    System.out.print("Enter number of Courses in this Department :");
    
    int n=in.nextInt();
    
    li=new ArrayList<Course>(n);
    
    Course obj;
    
    for(int i=0;i<n;i++)
    {   
        obj=new Course();
        
        System.out.println("\tCourse "+(i+1)+" :");
        
        obj.setcourse();
        
        li.add(obj);
    }
     }
     void showdept()
    {
        int c=1;
        
        System.out.println(name);
        
        for(Course i:li)
        {
            System.out.print("\tCourse "+c+" :");
            
            i.showcourse();
            
            c++;
        }
    } 
}
/**
 * This class represents an Institute
 *
 */
class Institute
{
  String name;
  
     ArrayList<Department> li;
     
     void setinst()
     {
         Scanner in=new Scanner(System.in);
         
         System.out.println("Enter name of this Institute :");
         
         name=in.next();
         
    System.out.print("Enter number of Departments in this Institute :");
    
    int n=in.nextInt();
    
    li=new ArrayList<Department>(n);
    
    Department obj;
    
    for(int i=0;i<n;i++)
    {   
        obj=new Department();
        
        System.out.println("\tDepartment "+(i+1)+" :");
        
        obj.setdept();
        
        li.add(obj);
    }
     }
     void showinst()
    {
        int c=1;
        
        System.out.println(name);
        
        for(Department i:li)
        {
            System.out.print("\tDepartment "+c+" :");
            
            i.showdept();
            
            c++;
        }
    }   
}
/**
 * This class represents a University containing one or more Institute
 *
 */
public class University {
    
    public static void main(String[] args)
    {
        Scanner in=new Scanner(System.in);
        
        System.out.println("Welcome!");
        
        Institute obj=new Institute();
        
        obj.setinst();
        
        obj.showinst();   
    }
}