Energy Booster

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String fruit = scanner.nextLine(),
                fruitSize = scanner.nextLine();
        int fruitCount = Integer.parseInt(scanner.nextLine());
        double fruitPrice = 0;

        if (fruit.equals("Watermelon")) {
            if (fruitSize.equals("small")) {
                fruitPrice = 56.00;
            } else {
                fruitPrice = 28.70;
            }
        } else if (fruit.equals("Mango")) {
            if (fruitSize.equals("small")) {
                fruitPrice = 36.66;
            } else {
                fruitPrice = 19.60;
            }
        } else if (fruit.equals("Pineapple")) {
            if (fruitSize.equals("small")) {
                fruitPrice = 42.10;
            } else {
                fruitPrice = 24.80;
            }
        } else if (fruit.equals("Raspberry")) {
            if (fruitSize.equals("small")) {
                fruitPrice = 20.00;
            } else {
                fruitPrice = 15.20;
            }
        }

        if (fruitSize.equals("small")) {
            fruitPrice *= 2;
        } else {
            fruitPrice *= 5;
        }

        double totalPrice = fruitPrice * fruitCount;

        if (totalPrice >= 400 && totalPrice <= 1000) {
            totalPrice *= 0.85;
        } else if (totalPrice > 1000) {
            totalPrice /= 2;
        }

        System.out.printf("%.2f lv.\n", totalPrice);
    }
}

Решение със switch и тернарен оператор:

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String fruit = scanner.nextLine(),
                fruitSize = scanner.nextLine();
        int fruitCount = Integer.parseInt(scanner.nextLine());
        double fruitPrice = 0;

        switch (fruit) {
            case "Watermelon" -> fruitPrice = fruitSize.equals("small") ? 56.00 : 28.70;
            case "Mango" -> fruitPrice = fruitSize.equals("small") ? 36.66 : 19.60;
            case "Pineapple" -> fruitPrice = fruitSize.equals("small") ? 42.10 : 24.80;
            case "Raspberry" -> fruitPrice = fruitSize.equals("small") ? 20.00 : 15.20;
        }

        fruitPrice *= fruitSize.equals("small") ? 2 : 5;
        double totalPrice = fruitPrice * fruitCount;
        totalPrice *= totalPrice >= 400 && totalPrice <= 1000 ? 0.85 : totalPrice > 1000 ? 0.50 : 1;

        System.out.printf("%.2f lv.\n", totalPrice);
    }
}