import java.util.concurrent.ConcurrentHashMap;
import java.util.Random;
import java.util.Map;

class Environment {
    private Map<Point, Food> foodLocations;
    private final int width, height;

    private Random rand;

    public Environment(int width, int height) {
	foodLocations = new ConcurrentHashMap<>();
	this.width = width;
	this.height = height;
	
	rand = new Random();
    }

    public void update() {
	Food f = new Food(5);
	Point p = new Point(rand.nextInt(width), rand.nextInt(height));
	foodLocations.put(p, f);
    }

    public boolean hasFood(Point p) {
	Food f = foodLocations.get(p);
	return (f != null) && (f.getAmount() > 0);
    }

    public void dropFood(Point p) {
	Food f = foodLocations.get(p);
	if (f != null)
	    f.addFood(1);
    }
}