GiuneaPig

package Fundamentals.Exams;

import java.util.Scanner;

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


        double foodQuantity = Double.parseDouble(scanner.nextLine()) * 1000;
        double hayQuantity = Double.parseDouble(scanner.nextLine()) * 1000;
        double coverQuantity = Double.parseDouble(scanner.nextLine()) * 1000;
        double guineaWeight = Double.parseDouble(scanner.nextLine()) * 1000;

        int dayCount = 0;
        while (dayCount < 30 && foodQuantity >0 && hayQuantity > 0 && coverQuantity > 0) {
            dayCount++;
            foodQuantity -= 300;
            if (dayCount % 2 == 0) {
                hayQuantity = hayQuantity - (hayQuantity * 0.5);
            }
            if (dayCount % 3 == 0) {
                coverQuantity = coverQuantity - (guineaWeight * 1/3);
            }
        }
        foodQuantity = foodQuantity / 1000;
        hayQuantity =  hayQuantity / 1000;
        coverQuantity = coverQuantity / 1000;

        boolean checker = foodQuantity >0 && hayQuantity > 0 && coverQuantity > 0;
        if (checker) {
            System.out.printf("Everything is fine! Puppy is happy! Food: %.2f, Hay: %.2f, Cover: %.2f.", foodQuantity, hayQuantity, coverQuantity);
        } else {
            System.out.println("Merry must go to the pet store!");
        }
    }
}