package day01;
import java.util.Scanner;
public class Rabbit {
public static void main(String[] args) {
System.out.println("please enter the month");
Scanner n = new Scanner(System.in);
int rabbit=n.nextInt();
System.out.println("第"+rabbit+"个月的兔子数量为"+fun(rabbit));
n.close();
}
public static int fun(int n){
if(n==1||n==2)
return 1;
else
return fun(n-1)+fun(n-2);
}
}