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;
        while (n > 0) {
            h /= 2;
            n--;
            if (n != 0) sum += 2 * h;
        }

        //输出格式为：
        System.out.println(String.format("%.3f", h) + " " + String.format("%.3f", sum));
    }
}