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/*

this program is used to find minimum distance between two vertices while traversing all available vertices.

*/

import java.util.*;

/**

* This class is to represent 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);

}

}

/*this funtion is used show the all item */

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();

}

}