/*
 * Keeps track of rabbit population
 */
public class RabbitPopulation {
    private int numImmatureRabbits;
    private int numMatureRabbits;
    /*
     * Constructs the Rabbit Population with 1 pair
     */
    public RabbitPopulation() {
        this.numMatureRabbits = 2;
    }
    /*
     * Simulates 1 Month
     */
    public void waitAMonth() {
        int tempMatureRabbits = this.numMatureRabbits;
        this.numMatureRabbits = this.numMatureRabbits + this.numImmatureRabbits;
        this.numImmatureRabbits = tempMatureRabbits;
    }
    
    public int getPairs() {
        return (this.numMatureRabbits + this.numImmatureRabbits) / 2;
    }
}