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();

        //write your code here......
        float sum = h;
        float a = h;
        double num = Math.pow(2,n);
        float height = (float) (h / num);

        for(int i = 1;i < n;i++){
            a = a / 2;
            sum += (a * 2);
        }

        System.out.println(String.format("%.3f", height)+" "+String.format("%.3f", sum));
        
    }
}