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 = 0;
        sum -= h;
        for(int i = 0; i < n;i++)
        {
            sum += (2*h);
            h/=2;
        }

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