public class S1Problem1 {
    public static void main(String[] args) {
        System.out.println("Problem 1");


    }
}

public class S1Problem2 {
    public static void main(String[] args) {
        System.out.println("Problem 2");


    }
}

public class S1Problem3 {
    public static void main(String[] args) {
        System.out.println("Problem 3");


    }
}

public class S1Problem4 {
    public static void main(String[] args) {
        System.out.println("Problem 4");


    }
}

public class S1Problem5 {
    public static void main(String[] args) {
        System.out.println("Problem 5");


    }
}

public class S1Problem6 {
    public static void main(String[] args) {
        System.out.println("Problem 6");


    }
}

public class S1Problem7 {
    public static void main(String[] args) {
        System.out.println("Problem 7");


    }
}

public class S1Problem8 {
    public static void main(String[] args) {
        System.out.println("Problem 8");


    }
}

public class S1Problem7 {
    public static void main(String[] args) {
        System.out.println("Problem 9");


    }
}

public class S1Problem7 {
    public static void main(String[] args) {
        System.out.println("Problem 10");


    }
}

import java.util.*;

public class CastingDemo {
    public static void main(String[] args) {
        System.out.println("Casting Demo");

        // Example 1
        
                      
        // Example 2
        
        
        // Example 3
        
        
        // Example 4
        
        
        // Example 5
        
        
        // Example 6
        
        
        // Example 7
        
        
        // Example 8
        

    }
}

public class CompoundOperator {
    public static void main(String[] args) {
        int x = 10;
        System.out.println("Initial value of x: " + x);

        // addition
       

        // subtraction
        

        // multiplication
        

        // division
        

        // modulus
       

    }
}

import java.util.*;

public class S3Problem1 {
    public static void main(String[] args) {
        System.out.println("Problem 1");
        Scanner in = new Scanner(System.in);
        


    }
}

import java.util.*;

public class S3Problem2 {
    public static void main(String[] args) {
        System.out.println("Problem 2");
        Scanner in = new Scanner(System.in);
        


    }
}

import java.util.*;

public class S3Problem3 {
    public static void main(String[] args) {
        System.out.println("Problem 3");
        Scanner in = new Scanner(System.in);
        


    }
}

import java.util.*;

public class S3Problem4 {
    public static void main(String[] args) {
        System.out.println("Problem 4");
        Scanner in = new Scanner(System.in);
        


    }
}

import java.util.*;

public class S3Problem5 {
    public static void main(String[] args) {
        System.out.println("Problem 5");
        Scanner in = new Scanner(System.in);
        


    }
}

import java.util.*;

public class S3Problem6 {
    public static void main(String[] args) {
        System.out.println("Problem 6");
        Scanner in = new Scanner(System.in);
        


    }
}

import java.util.*;

public class S3Problem7 {
    public static void main(String[] args) {
        System.out.println("Problem 7");
        Scanner in = new Scanner(System.in);
        


    }
}

import java.util.*;

public class S3Problem8 {
    public static void main(String[] args) {
        System.out.println("Problem 8");
        Scanner in = new Scanner(System.in);
        


    }
}

import java.util.*;

public class Session7 {
    public static void main(String[] main) {
        System.out.println("Session 7");
        
        // Example 1
        
        
        // Example 2
        
        
        // Example 3
        
        
        // Example 4
         
        
        // Example 5
        
        
        // Example 6
        
        
        // Example 7
        
        
        // Example 8
        
        
        // Example 9
        
        
        // Example 10
        
        
        // Example 11
        
        
        // Example 12
        
        
        // Example 13
        
        
        // Example 14
        
        
        // Example 15
        
        
        
        // example1 method call
        
        // example2 method call
        
        

    }
    // example1 method definition


    // example2 method definition



}

import java.util.*;

public class S7Problem1 {
    public static void main(String[] args) {
        System.out.println("Problem 1");


    }
}

import java.util.*;

public class S7Problem2 {
    public static void main(String[] args) {
        System.out.println("Problem 2");


    }
}

import java.util.*;

public class S7Problem3 {
    public static void main(String[] args) {
        System.out.println("Problem 3");


    }
}

import java.util.*;

public class EmailDomain
{
    public static String getDomain(String email)
    {
        // TODO: Use indexOf and substring only.
        // Example: "[email protected]" → "school.edu"
        String domain;
        

        return domain;
    }

    public static void main(String[] args)
    {
        // Do not change main!
        Scanner in = new Scanner(System.in);
        System.out.print("What is your email address? ");
        String email = in.nextLine();
        System.out.println("Domain: " + getDomain(email));
        in.close();
    }
}

import java.util.*;

public class FileExtension
{
    public static String getExtension(String fileName)
    {
        // TODO: Use indexOf and substring only.
        // Example: "photo.jpeg" → "jpeg"
        String ext;
 

        return ext;
    }

    public static void main(String[] args)
    {
        // Do not change main!
        Scanner in = new Scanner(System.in);
        System.out.print("What is the filename? ");
        String fileName = in.nextLine();
        System.out.println("Extension: " + getExtension(fileName));
        in.close();
    }
}

import java.util.*;

public class FirstSentence
{
    public static String getFirstSentence(String paragraph)
    {
        // TODO: Use indexOf and substring only.
        // Assume sentences end with a period '.'
        // Return everything up to and including the first '.'
        // Example:
        // "Today is Monday. We have class." → "Today is Monday."
        String first;
        

        return first;
    }

    public static void main(String[] args)
    {
        // Do not change main!
        Scanner in = new Scanner(System.in);
        System.out.print("What is the paragraph? ");
        String paragraph = in.nextLine();
        System.out.println("First sentence: " + getFirstSentence(paragraph));
        in.close();
    }
}

import java.util.*;

public class AreaCode
{
    public static String getAreaCode(String phone)
    {
        // TODO: Use indexOf and substring only.
        // Assume the phone number format is "(###) ###-####"
        // Example: "(212) 000-0000" → "212"
        String code;
        

        return code;
    }

    public static void main(String[] args)
    {
        // Do not change main!
        Scanner in = new Scanner(System.in);
        System.out.print("What is the phone number (000) 000-0000 ? ");
        String phone = in.nextLine();
        System.out.println("Area code: " + getAreaCode(phone));
        in.close();
    }
}

import java.util.*;

public class SecretPhrase
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);

        // The secret phrase
        String secret = null;

        // --- Step 1: Give the user hints ---
        

        // --- Step 2: Let the user ask questions ---
        

        // --- Step 3: Let the user guess the phrase ---


        // --- Step 4: Compare using equals()


        in.close();
    }
}

public class TypesDemo {
    public static void main(String[] args) {
        System.out.println("Types Demo");
        // 1. byte: 8-bit signed integer
        

        // 2. short: 16-bit signed integer
        

        // 3. int: 32-bit signed integer
        

        // 4. long: 64-bit signed integer (needs 'L' at the end for large values)
        

        // 5. float: 32-bit floating point (needs 'f' at the end)
        

        // 6. double: 64-bit floating point
        

        // 7. char: single 16-bit Unicode character
        

        // 8. boolean: true or false
        

        // Print them

        
        // String

        
        
    }
}

public class ArithmeticDemo {
    public static void main(String[] args) {
        System.out.println("Arithmetic Demo");
        // Integer arithmetic
        int a = 15;
        int b = 4;
        

        // Double arithmetic
        double x = 15.0;
        double y = 4.0;


    }
}

// import all the classes and interfaces from the java.util package into your program.
import java.util.*;

public class ScannerExample {
    public static void main(String[] args) {
        System.out.println("Scanner Example Code");

        // 1. Print a message to the user
        

        // 2. Initialize the Scanner. Declare a variable named in
        // that reads from System.in
        

        // 3. Create a variable and assign it to the value returned by nextLine
        // The Scanner class provides a method called nextLine that reads a
        // line of input from the keyboard and returns a String.
        

        // 4. Print the value of the variable
        
        
        // 5. Close the Scanner
        

    }
}

import java.util.*;

public class ScannerExample2 {
    public static void main(String[] args) {
        System.out.println("Scanner Example 2 Code");

        Scanner in = new Scanner(System.in);
        System.out.print("What's your age? ");
        int age = in.nextInt();
        // add code to fix the "Scanner bug"

        System.out.print("What's your name? ");
        String line = in.nextLine();
        System.out.println("Name: " + line);
        System.out.println("Age: " + age);
        in.close();
    }
}

import java.util.*;

public class CastingDemo {
    public static void main(String[] args) {
        System.out.println("Casting Demo");

        // Example 1
        
                      
        // Example 2
        
        
        // Example 3
        
        
        // Example 4
        
        
        // Example 5
        
        
        // Example 6
        
        
        // Example 7
        
        
        // Example 8
        

    }
}

public class S2Problem1 {
    public static void main(String[] args) {
        System.out.println("Problem 1");


    }
}

public class S2Problem2 {
    public static void main(String[] args) {
        System.out.println("Problem 2");


    }
}

public class S2Problem3 {
    public static void main(String[] args) {
        System.out.println("Problem 3");


    }
}

public class S2Problem4 {
    public static void main(String[] args) {
        System.out.println("Problem 4");


    }
}

public class S2Problem5 {
    public static void main(String[] args) {
        System.out.println("Problem 5");


    }
}

public class S2Problem6 {
    public static void main(String[] args) {
        System.out.println("Problem 6");


    }
}

public class S2Problem10 {
    public static void main(String[] args) {
        System.out.println("Problem 10");


    }
}

public class S2Problem11 {
    public static void main(String[] args) {
        System.out.println("Problem 11");


    }
}

public class S2Problem12 {
    public static void main(String[] args) {
        System.out.println("Problem 12");


    }
}

import java.util.*;

public class TipCalculator {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        System.out.print("Enter the total bill amount: ");
        
        System.out.print("Enter the tip: ");


        System.out.println("Bill Amount: $");
        System.out.println("Tip (specify the %): $");
        System.out.println("Total Amount: $");
    }
}

import java.util.*;

public class CurrencyConverter {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        System.out.print("Enter amount in USD: ");


        System.out.println("Amount in Euro EUR: ");
        System.out.println("Amount in British Pound GBP: ");
        System.out.println("Amount in Japanese Yen JPY: ");
        System.out.println("Amount in Indian Rupee INR: ");
        System.out.println("Amount in Australian Dollar AUD: ");
        System.out.println("Amount in Canadian Dollar CAD: ");
        System.out.println("Amount in Swiss Franc CHF: ");
        System.out.println("Amount in Chinese Yuan Renminbi CNY: ");
        System.out.println("Amount in Malasian Ringgit MYR: ");
        System.out.println("Amount in Singapore Dollar SGD: ");
        
        
    }
}

import java.util.*;

public class CompoundInterestCalculator {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        System.out.print("Enter the principal amount: ");
        
        System.out.print("Enter the annual interest rate (in decimal): ");
        
        System.out.print("Enter the number of years: ");

        System.out.println("The amount after " + " years is: ");
    }
}

import java.util.*;

public class Session9v1 {
    public static void main(String[] args) {
        System.out.println("Session 9");

        // Example 1 method call
        
        // Example 2 method call
        
        // Example 3 method call

    }
    // example1 method definition
    public static void example1() {
        Scanner in = new Scanner(System.in);
        // add code
    
    }
    // example2 method definition
    public static void example2() {
        Scanner in = new Scanner(System.in);
        // add code
    
    }
    // example3 method definition 
    public static void example3() {
        Scanner in = new Scanner(System.in);
        System.out.print("Number of Credits: ");
        int creditsCompleted = in.nextInt();
        in.nextLine();
        System.out.print("GPA: ");
        double gpa = in.nextDouble();
        in.nextLine();
        System.out.print("Completed Capstone [true/false]: ");
        boolean hasPassedCapstone = in.nextBoolean();
        
        // add code
        
        
    }
}

import java.util.*;

public class S9Problem1 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 1");


    }
}

import java.util.*;

public class S9Problem2 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 2");


    }
}

import java.util.*;

public class S9Problem3 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 3");


    }
}

import java.util.*;

public class Session9v2 {
    public static void main(String[] args) {
        System.out.println("Session 9");
        // Menu


        // setup Scanner
 

        // switch statement
 

    }
    // example2 method definition
    
    // example3 method definition

    // example4 method definition
    
    // example5 method definition

    // example6 method definition
    
    // example7 method definition
    
    // example8 method definition
    
    // example9 method definition
    
    // example10 method definition
    
    // example11 method definition
    
    // example12 method definition
    

}

import java.util.*;

public class S9Problem4 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 4");
        System.out.print("Enter a number (1–7): ");
        int day = in.nextInt();
        in.nextLine();

        if (day == 1)
            System.out.println("Sunday");
        else if (day == 2)
            System.out.println("Monday");
        else if (day == 3)
            System.out.println("Tuesday");
        else if (day == 4)
            System.out.println("Wednesday");
        else if (day == 5)
            System.out.println("Thursday");
        else if (day == 6)
            System.out.println("Friday");
        else if (day == 7)
            System.out.println("Saturday");
        else
            System.out.println("Invalid number!");
    }
}

import java.util.*;

public class S9Problem5 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 5");
        System.out.print("Enter first number: ");
        double num1 = in.nextDouble();
        in.nextLine();
        System.out.print("Enter operator (+, -, *, /): ");
        char op = in.next().charAt(0);
        System.out.print("Enter second number: ");
        double num2 = in.nextDouble();
        in.nextLine();

        if (op == '+')
            System.out.println(num1 + num2);
        else if (op == '-')
            System.out.println(num1 - num2);
        else if (op == '*')
            System.out.println(num1 * num2);
        else if (op == '/')
            System.out.println(num1 / num2);
        else
            System.out.println("Invalid operator!");
    }
}

import java.util.*;

public class S9Problem6 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 6");


    }
}

import java.util.*;

public class S9Problem7 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 7");


    }
}

import java.util.*;

public class S9Problem8 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 8");


    }
}

import java.util.*;

public class S9Problem9 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 9");


    }
}

import java.util.*;

public class S9Problem10 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 10");


    }
}

import java.util.*;

public class S9Problem11 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 11");


    }
}

import java.util.*;

public class S9Problem12 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 12");


    }
}

import java.util.*;

public class S9Problem13 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 13");


    }
}

import java.util.*;

public class S9Problem14 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 13");


    }
}

import java.util.*;

public class S9Problem15 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 15");


    }
}

import java.util.*;

public class S9Problem16 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 16");


    }
}

import java.util.*;

public class Week20 {
    public static void main(String[] args) {
        String myName = ""; // add your name
        System.out.println("Week 20" + " - " + myName);

        // Menu
        System.out.println("Menu");
        System.out.println("E1 - Example 1");
        System.out.println("Q  - Quit");

        // setup Scanner
        Scanner in = new Scanner(System.in);
        System.out.print("Choice: ");
        String choice = in.nextLine();

        // switch choices
        switch (choice) {
            case "E1":
                System.out.println("Example 1");
                example1();
                break;
            case "E2":
                System.out.println("Example 2");
                example2();
                break;
            case "E3":
                System.out.println("Example 3");
                example3();
                break;
            case "E4":
                System.out.println("Example 4");
                example4();
                break;
            case "Q":
                System.out.println("Quitting..!");
                break;
        }
    }

    // example1 method
    public static void example1() {
        // Create Objects
        

        // Create an array of Felines
        

        // populate the array with Cat and Tiger objects
        

        // loop through array and call method
        

        // instanceOf Examples
        // is catty a Feline?
        

        // is tigris a Feline?
        

        // is felix a Cat?
        
        
    }

    // example2 method
    public static void example2() {
        // create a new Zoo
        

        // Adding different animals to the zoo
        

        // Displaying all animals in the zoo
        

    }

    // example3 method
    public static void example3() {
        // Create Object
        
    }

    // example4 method
    public static void example4() {
        // Create Object
        
    }

}

// class header
public class Feline {
    // private instance variable
    

    // constructor
    

    // constructor
    

    // methods
    

}

// class header
public class Tiger extends Feline {

    // methods



}

// class header
public class Cat extends Feline {

     // constructors
     


     // methods
     

}

import java.util.*;

// Base class representing a generic Animal (IS-A relationship)
class Animal {
    // Method to make a generic animal sound
    public void makeSound() {
        System.out.println("Animals make sounds");
    }
}

// Subclass representing a Bear (IS-A Animal)
class Bear extends Animal {
    // Method specific to Bear
    public void growl() {
        System.out.println("Bears like to growl");
    }
}

// Subclass representing a Lion (IS-A Animal)
class Lion extends Animal {
    // Method specific to Lion
    public void roar() {
        System.out.println("Lions like to roar");
    }
}

// Subclass representing an Elephant (IS-A Animal)
class Elephant extends Animal {
    // Method specific to Elephant
    public void forage() {
        System.out.println("Elephants like to forage");
    }
}

// Zoo class HAS-A relationship with a list of animals
class Zoo {
    // ArrayList to store Animal objects
    

    // Constructor to initialize the list of animals
    

    // Add an animal to the zoo
    

    // Method to display the sounds of all animals in the zoo
    
            // Check if the animal is a Bear
            
            
            // Check if the animal is a Lion
            
            // Check if the animal is an Elephant
            
            
}

import java.util.*;

// Superclass


// Subclass: 


// Subclass: 


// Subclass: 


// Subclass: 


// Main class
public class Professions {
    public static void main(String[] args) {
        // create an ArrayList of Professions
        

        // Creating instances of each profession
        

        // Adding objects to the ArrayList
        

        // Loop through ArrayList of Professions using instanceof and calling methods
        
        
    }
}

class CharacterBase {
    void action() {
        System.out.println("Ready to fight! ");
    }
}

class Warrior extends CharacterBase {
    public Warrior() {
        System.out.println("Equipped with sword! ");
        super.action();
    }
}

class Knight extends Warrior {
    public Knight() {
        System.out.println("For the kingdom!");
    }
}

public class MainCharacter {
    public static void main(String[] args) {
        Knight k = new Knight();
    }
}

// A class called Rectangle that has two instance variables, length and width,
// a constructor that initializes them, and a method called draw that uses nested loops
// to draw a length x width rectangle of stars.
class Rectangle {
    private int length;
    private int width;

    // Constructor that initializes length and width
    public Rectangle(int l, int w) {
        length = l;
        width = w;
    }

    // Method to draw a rectangle of stars based on length and width
    public void draw() {
        for (int i = 0; i < length; i++) {
            for (int j = 0; j < width; j++) {
                System.out.print("* ");
            }
            System.out.println();
        }
        System.out.println();
    }

    // Add an area method to compute the area of the rectangle


}

// Make the class Square below inherit from Rectangle

    // Add a Square constructor with 1 argument for a side
    // that calls Rectangle's constructor with 2 arguments using super
    

// Add another subclass called LongRectangle which inherits from Rectangle
// but has the additional condition that the length is always 2 x the width



public class SquareDemo {
    public static void main(String[] args) {
        // Create a Rectangle object and draw it
        Rectangle r = new Rectangle(3, 5);
        // System.out.println("Area of rectangle: " + r.area());
        r.draw();

        // Uncomment the objects to test the squares
        // Square s1 = new Square(1);
        // System.out.println("Area of square with side 1: " + s1.area());
        // s1.draw();

        // Square s2 = new Square(3);
        // System.out.println("Area of square with side 3: " + s2.area());
        // s2.draw();
        // System.out.println();

        // Uncomment the objects to test the rectangle
        // LongRectangle lr = new LongRectangle(4);
        // System.out.println("Area of long rectangle with length 4: " + lr.area());
        // lr.draw();
    }
}

import java.util.*;

public class Session12 {
    public static void main(String[] args) {
        System.out.println("Session 12");
        Scanner in = new Scanner(System.in);
        // Menu
        System.out.println("Menu");
        System.out.println("E1 - Example 1");

        // setup Scanner
        System.out.print("Choice: ");
        String choice = in.nextLine();

        // switch statement
        switch (choice) {
            case "E1":

                break;
            case "E2":
                
                break;
            case "E3":
                
                break;
            case "E4":
                
                break;
            case "E5":
                
                break;
            case "E6":
                
                break;
            case "E7":
                
                break;
            case "E8":
                
                break;
            case "E9":
                
                break;
            case "E10":
                
                break;
            case "E11":
                
                break;
            case "E12":
                
                break;
            case "E13":
                
                break;
            case "E14":
                
                break;
            default:
                System.out.println("Invalid choice");
                break;
        }
    }

    // example1 method definition


    // example2 method definition


    // example3 method definition


    // example4 method definition
    
    
    // example5 method definition
    
    
    // example6 method definition
    
    
    // example7 method definition
    
    
    // example8 method definition
    
    
    // example9 method definition


    // example10 method definition


    // example11 method definition    

    
    // example12 method definition    
    
    
    // example13 method definition    


    // example14 method definition


}

import java.util.*;

public class S12Problem1 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 1");

        
    }
    public static int countFactors(int n) {
        
        

        return 0; // placeholder
    }
}

import java.util.*;

public class S12Problem2 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 2");
        
        
    }
    public static int gcd(int a, int b) {
        int gcd = 1;
        
        
        return 0; // placeholder
    }
}

import java.util.*;

public class S12Problem3 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 3");

        
        
    }
    public static boolean isFibonacci(int n) {
    
        return false; // placeholder
    }
}

import java.util.*;

public class S12Problem4 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 4");

        
        
    }
    public static void printDigitSum(int n) {
        
    }
}

import java.util.*;

public class S12Problem5 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 5");

        
        
    }
    public static int getKthDigit(int n, int k) {
        

        return -1; // placeholder
    }
}

import java.util.*;

public class S12Problem6 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 6");

        
        
    }
    public static void printDigitsReverse(int n) {


    }
}

import java.util.*;

public class S12Problem7 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 7");

        
    }
}

import java.util.*;

public class S12Problem8 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 8");

        
    }
}

import java.util.*;

public class S17Problem3 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 9");

        
    }
}

import java.util.*;

public class S12Problem10 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 10");

        
    }
}

import java.util.*;

public class S12Problem11 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 11");

        
    }
}

import java.util.*;

public class S12Problem12 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 12");

        
    }
}

import java.util.*;

public class S12Problem13 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Problem 13");

        
    }
}

import java.util.*;

public class Session6 {
    public static void main(String[] args) {
        System.out.println("Session 6");
        // example1 method call
    
        
        // example2 method call  
      
    
    }
    // example1 method definition
    public static void example1() {
      // Create Counter object
      
      // Increment counter
      
      // Print counter variable
      
      // Reset counter value
      
      // Print counter value (again)
      
      // click twice and print the value
      
      // 
    
    }
    
    // example2 method definition
    public static void example2() {
    
    }
}

public class Ant {
    // instance variable
   

    // Constructor


    // display method


    // main method
    public static void main(String[] args) {
        System.out.println("Ant Class Demo");
        // Example 1

        // Example 2

        // Example 3
 
    }
}

import java.util.*;

public class Week15 {
    public static void main(String[] args) {
        String myName = ""; // add your name
        System.out.println("Week 15" + " - " + myName);

        // Menu
        System.out.println("Menu");
        System.out.println("E1 - Example 1");
        System.out.println("Q  - Quit");

        // setup Scanner
        Scanner in = new Scanner(System.in);
        System.out.print("Choice: ");
        String choice = in.nextLine();

        // switch choices
        switch (choice) {
            case "E1":
                System.out.println("Example 1");
                example1();
                break;
            case "E2":
                System.out.println("Example 2");
                example2();
                break;
            case "E3":
                System.out.println("Example 3");
                example3();
                break;
            case "E4":
                System.out.println("Example 4");
                example4();
                break;
            case "E5":
                System.out.println("Example 5");
                example5();
                break;
            case "E6":
                System.out.println("Example 6");
                example6();
                break;
            case "E7":
                System.out.println("Example 7");
                example7();
                break;
            case "E8":
                System.out.println("Example 8");
                example8();
                break;
            case "E9":
                System.out.println("Example 8");
                example9();
                break;
            case "Q":
                System.out.println("Quitting..!");
                break;
        }
    }

    // example1 method
    public static void example1() {
        // declares an array of integers
        

        // create an empty array of size 3
        

        // print the values in the scores array
        

        // declare and create an array of doubles
        

        // assign values to each index position
        

        // print the values in the prices array
        

    }

    // example2 method
    public static void example2() {
        // declare an array of String elements
        

        // assign values to each index position
        

        // print the values in the friends array
        

    }
    // example3 method
    public static void example3() {
        // create an array with an initializer list
        

        // .length property
        
    }

    // example4 method
    public static void example4() {
        // declare and create an array
        int[] arr = { 10, 20, 30, 40, 50 };

        // for loop to traverse the array
        

    }

    // example5 method
    public static void example5() {
        // declare and create an array
        double[] arr = { 1.1, 2.2, 3.3, 4.4, 5.5 };

        // while loop to traverse the array
        

    }

    // example6 method
    public static void example6() {
        // declare and create an array
        int[] arr = { 1, 2, 3, 4, 5 };

        // accumulator pattern
        

    }

    // example7 method
    public static void example7() {
        // declare array
        int[] arr = { 50, 100, 75, 25, 80 };

        // initialize max to first value
        

        // for loop
        
        
    }

    // example8 method
    public static void example8() {
        // declare array numbers
        int[] numbers = { 1, 2, 3, 4, 5 };
        // pass numbers to printArray method
        

        // pass numbers to changeArray method
        
        
    }

    // example9 method
    public static void example9() {
        // declare array
        int[] numArray = {3, 8, -3, 2, 1};
        
                
        // create an instance of ArrayWorker
        
        // call mystery method
        

    }

    // changeArray method
    public static void changeArray(int[] arr) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = arr[i] * 2;
        }
    }

    // printArray method
    public static void printArray(int[] arr) {
        System.out.println("Print Array");
        System.out.println("Index\tValue");
        for (int i = 0; i < arr.length; i++) {
            System.out.println(i + "\t" + arr[i]);
        }
    }
}

import java.util.*;

public class W15Problem1
{
    public static void main(String[] args)
    {
        System.out.println("Problem 1");
        
        
    }
}