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 = 0; //总路程
        float ffianl = (float)(Math.pow(h, 0.5));
        for (int i = 0; i < n; i++) {
            sum = (float)(sum + h + 0.5 * h);
            h = (float)(h * 0.5);
        }
        sum = sum - h; //要减去最后落地弹起的高度
        System.out.println(String.format("%.3f", h) + " " + String.format("%.3f", sum));

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


    }
}