题解 | #小球走过路程计算#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        float h=scanner.nextFloat();
        int n =scanner.nextInt();
        float sum=h;
        for(int i=0;i<n-1;i++){
            h/=2;
            sum=sum+h*2;
        }
        System.out.println(String.format("%.3f", h/2)+" "+String.format("%.3f", sum));
        

    }
}