// model parameters
class Param 
{
    // basic parameters
    public static final int maxX = 10;  // width of the grid of habitats
    public static final int maxY = 20;  // height of the grid of habitats
    public static final int numAnimals = 100; // initial number of animals
    
    // about the zebras
    public static final double maxSize = 20;  // maximum enery reserves
    public static final double moveCost = 0.4; // cost of moving to the next square
    public static final double timeCost = 0.5; // amount of energy spent just existing for a day
    public static final double eatAmount = 0.8; // maximum amount that can be eaten in a day

    // about the habitats
    public static double food(int x, int y) 
    {
        // initial amount of food in each square
        return 10*(1.0+x)/(y+5);
    }
    public static double growAmount(int x, int y) 
    {
        // amount of growth per day
        return 0.5*(1.0+x)/(y+5);
    }
}