import java.util.ArrayList;
import java.util.List;

class Product {
    private int id;
    private String name;
    private int quantity;
    private double price;

    // Constructors
    public Product(int id, String name, int quantity, double price) {
        this.id = id;
        this.name = name;
        this.quantity = quantity;
        this.price = price;
    }

    // Getters and setters
    public int getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public int getQuantity() {
        return quantity;
    }

    public double getPrice() {
        return price;
    }

    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }

    // Other getters and setters if needed
}

class InventoryManager {
    private List<Product> inventory = new ArrayList<>();

    public void addProduct(Product product) {
        inventory.add(product);
        System.out.println("Product added to the inventory: " + product.getName());
    }

    public void updateQuantity(int productId, int newQuantity) {
        for (Product product : inventory) {
            if (product.getId() == productId) {
                product.setQuantity(newQuantity);
                System.out.println("Quantity updated for product " + product.getName() +
                        ". New quantity: " + newQuantity);
                return;
            }
        }
        System.out.println("Product with ID " + productId + " not found in the inventory.");
    }

    public void generateSalesReport() {
        double totalRevenue = 0.0;
        System.out.println("Sales Report:");
        System.out.println("-----------------------------------------------------");
        System.out.printf("%-5s %-15s %-10s %-10s %-15s%n",
                "ID", "Product Name", "Quantity", "Price", "Total Revenue");
        System.out.println("-----------------------------------------------------");
        for (Product product : inventory) {
            double productRevenue = product.getPrice() * product.getQuantity();
            totalRevenue += productRevenue;
            System.out.printf("%-5d %-15s %-10d %-10.2f %-15.2f%n",
                    product.getId(), product.getName(), product.getQuantity(),
                    product.getPrice(), productRevenue);
        }
        System.out.println("-----------------------------------------------------");
        System.out.printf("Total Revenue: %.2f%n", totalRevenue);
    }

    // Other inventory management methods
}

public class Main {
    public static void main(String[] args) {
        // Create instances of Product and InventoryManager, and interact with the system
        Product product1 = new Product(1, "Laptop", 10, 899.99);
        Product product2 = new Product(2, "Smartphone", 20, 499.99);

        InventoryManager inventoryManager = new InventoryManager();

        inventoryManager.addProduct(product1);
        inventoryManager.addProduct(product2);

        inventoryManager.updateQuantity(1, 8);

        inventoryManager.generateSalesReport();
    }
}