Fitness Card

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double cash = Double.parseDouble(scanner.nextLine()), sum;
        String gender = scanner.nextLine();
        int age = Integer.parseInt(scanner.nextLine());
        String sport = scanner.nextLine();

        if (gender.equals("m")) {
            sum = switch (sport) {
                case "Gym" -> 42;
                case "Boxing" -> 41;
                case "Yoga" -> 45;
                case "Zumba" -> 34;
                case "Dances" -> 51;
                case "Pilates" -> 39;
                default -> 0;
            };
        } else {
            sum = switch (sport) {
                case "Gym" -> 35;
                case "Boxing" -> 37;
                case "Yoga" -> 42;
                case "Zumba" -> 31;
                case "Dances" -> 53;
                case "Pilates" -> 37;
                default -> 0;
            };
        }

        if (age <= 19) {
            sum *= 0.8;
        }

        if (sum <= cash) {
            System.out.println("You purchased a 1 month pass for " + sport + ".");
        } else {
            System.out.printf("You don't have enough money! You need $%.2f more.\n", sum - cash);
        }
    }
}

Решение със switch и тернарен оператор:

import java.io.PrintStream;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double cash = Double.parseDouble(scanner.nextLine());
        String gender = scanner.nextLine();
        int age = Integer.parseInt(scanner.nextLine());
        String sport = scanner.nextLine();

        cash -= switch (sport) {
            case "Gym" -> gender.equals("m") ? 42 : 35;
            case "Boxing" -> gender.equals("m") ? 41 : 37;
            case "Yoga" -> gender.equals("m") ? 45 : 42;
            case "Zumba" -> gender.equals("m") ? 34 : 31;
            case "Dances" -> gender.equals("m") ? 51 : 53;
            case "Pilates" -> gender.equals("m") ? 39 : 37;
            default -> 0;
        } * (age <= 19 ? 0.8 : 1);

        PrintStream p = cash >= 0
                ? System.out.printf("You purchased a 1 month pass for %s.\n", sport)
                : System.out.printf("You don't have enough money! You need $%.2f more.\n", Math.abs(cash));
    }
}