Care of Puppy

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int foodInKilograms = Integer.parseInt(scanner.nextLine()),
                availableFoodInGrams = foodInKilograms * 1000;

        String command;
        while (!(command = scanner.nextLine()).equals("Adopted")) {
            availableFoodInGrams -= Integer.parseInt(command);
        }

        if (availableFoodInGrams >= 0) {
            System.out.printf("Food is enough! Leftovers: %d grams.", availableFoodInGrams);
        } else {
            System.out.printf("Food is not enough. You need %d grams more.", Math.abs(availableFoodInGrams));
        }
    }
}