04. Food for Pets

import java.util.Scanner;

public class FoodForPets_04 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int days = Integer.parseInt(scanner.nextLine());
        double availableFood = Double.parseDouble(scanner.nextLine());

        double totalDog = 0;
        double totalCat = 0;
        double total = 0;
        double totalBiscuits = 0;

        for (int day = 1; day <= days ; day++) {
            int dog = Integer.parseInt(scanner.nextLine());
            int cat = Integer.parseInt(scanner.nextLine());

            totalDog += dog;
            totalCat += cat;
            total += dog + cat;

            if(day % 3 == 0) {
                totalBiscuits += 0.10 * (dog + cat);
            }
        }

        System.out.printf("Total eaten biscuits: %dgr.%n", Math.round(totalBiscuits));
        double percentEaten = total / availableFood * 100;
        System.out.printf("%.2f%% of the food has been eaten.%n", percentEaten);
        double percentByDog = totalDog / total * 100;
        System.out.printf("%.2f%% eaten from the dog.%n", percentByDog);
        double percentByCat= totalCat / total * 100;
        System.out.printf("%.2f%% eaten from the cat.", percentByCat);
    }
}