Gymnastics

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String country = scanner.nextLine(),
                device = scanner.nextLine();
        double difficulty = 0, performance = 0;

        if (country.equals("Russia")) {
            if (device.equals("ribbon")) {
                difficulty = 9.100;
                performance = 9.400;
            } else if (device.equals("hoop")) {
                difficulty = 9.300;
                performance = 9.800;
            } else if (device.equals("rope")) {
                difficulty = 9.600;
                performance = 9.000;
            }
        } else if (country.equals("Bulgaria")) {
            if (device.equals("ribbon")) {
                difficulty = 9.600;
                performance = 9.400;
            } else if (device.equals("hoop")) {
                difficulty = 9.550;
                performance = 9.750;
            } else if (device.equals("rope")) {
                difficulty = 9.500;
                performance = 9.400;
            }
        } else if (country.equals("Italy")) {
            if (device.equals("ribbon")) {
                difficulty = 9.200;
                performance = 9.500;
            } else if (device.equals("hoop")) {
                difficulty = 9.450;
                performance = 9.350;
            } else if (device.equals("rope")) {
                difficulty = 9.700;
                performance = 9.150;
            }
        }

        double score = difficulty + performance;

        System.out.printf("The team of %s get %.3f on %s.\n%.2f%%\n", country, score, device, (20 - score) * 5);
    }
}

Решение със switch:

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String country = scanner.nextLine(),
                device = scanner.nextLine();
        double difficulty = 0, performance = 0;

        switch (country) {
            case "Russia" -> {
                switch (device) {
                    case "ribbon" -> {
                        difficulty = 9.100;
                        performance = 9.400;
                    }
                    case "hoop" -> {
                        difficulty = 9.300;
                        performance = 9.800;
                    }
                    case "rope" -> {
                        difficulty = 9.600;
                        performance = 9.000;
                    }
                }
            }
            case "Bulgaria" -> {
                switch (device) {
                    case "ribbon" -> {
                        difficulty = 9.600;
                        performance = 9.400;
                    }
                    case "hoop" -> {
                        difficulty = 9.550;
                        performance = 9.750;
                    }
                    case "rope" -> {
                        difficulty = 9.500;
                        performance = 9.400;
                    }
                }
            }
            case "Italy" -> {
                switch (device) {
                    case "ribbon" -> {
                        difficulty = 9.200;
                        performance = 9.500;
                    }
                    case "hoop" -> {
                        difficulty = 9.450;
                        performance = 9.350;
                    }
                    case "rope" -> {
                        difficulty = 9.700;
                        performance = 9.150;
                    }
                }
            }
        }

        double score = difficulty + performance;

        System.out.printf("The team of %s get %.3f on %s.\n%.2f%%\n", country, score, device, (20 - score) * 5);
    }
}