Food for Pets

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

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int days = Integer.parseInt(scanner.nextLine()),
                dailyDogFood, dailyCatFood, eatenDogsFood = 0, eatenCatsFood = 0;
        double availableFood = Double.parseDouble(scanner.nextLine()), cookies = 0;

        for (int i = 1; i <= days; i++) {
            dailyDogFood = Integer.parseInt(scanner.nextLine());
            dailyCatFood = Integer.parseInt(scanner.nextLine());

            if (i % 3 == 0) {
                cookies += 0.1 * (dailyDogFood + dailyCatFood);
            }
            eatenDogsFood += dailyDogFood;
            eatenCatsFood += dailyCatFood;
        }

        double totalEatenFood = eatenDogsFood + eatenCatsFood;

        System.out.printf("Total eaten biscuits: %dgr.\n", (int) Math.round(cookies));
        System.out.printf("%.2f%% of the food has been eaten.\n", 100.0 * totalEatenFood / availableFood);
        System.out.printf("%.2f%% eaten from the dog.\n", 100.0 * eatenDogsFood / totalEatenFood);
        System.out.printf("%.2f%% eaten from the cat.\n", 100.0 * eatenCatsFood / totalEatenFood);
    }
}