CatCalculator

import java.util.Scanner;

public class CatCalculator {
    public static void main(String[] agrs) {
        Scanner scanner = new Scanner(System.in);

        int number = Integer.parseInt(scanner.nextLine());//2515
        String command = scanner.nextLine();

        int firstNumber = number / 100;
        int secondNumber = number % 100;

        switch (command) {
            case "GCD"://най-голям общ делител
                while (secondNumber != 0) {
                    int oldB = secondNumber;
                    secondNumber = firstNumber % secondNumber;
                    firstNumber = oldB;
                }
                System.out.println(firstNumber);
                break;
            case "Beer"://25 15
                int lastFirst = firstNumber % 10;//5
                int oneFirst = firstNumber / 10;//2

                int lastSecond = secondNumber % 10;//5
                int oneSecond = secondNumber / 10;//1

                if (lastFirst > lastSecond) {
                    System.out.printf("Bigger is: %d%d", lastFirst, oneSecond);
                } else if (lastFirst < lastSecond) {
                    System.out.printf("Bigger is: %d%d", lastSecond, oneSecond);
                } else {
                    if (oneFirst > oneSecond) {
                        System.out.printf("Bigger is: %d%d", lastFirst, oneFirst);
                    } else if (oneFirst < oneSecond) {
                        System.out.printf("Bigger is: %d%d", lastSecond, lastFirst);
                    } else System.out.println("Numbers are equal!");
                }
                break;
            case "Meow":
                int symbolAscii = (firstNumber - secondNumber) * (firstNumber % secondNumber);
                System.out.println("The character is: " + (char) symbolAscii);
                break;
            default:
                System.out.println("Invalid command!");
                break;
        }
    }
}