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();

        double sum = 0;
        for(int i = 0;i < n;i++)
        {
            sum += Math.pow(0.5,i-1) * h;
        }
        System.out.println(String.format("%.3f", h*Math.pow(0.5,n))+" "+String.format("%.3f",sum-h));


    }
}