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++) {
            //计算球向下的总高度
            sum += h;
            //更新下一次高度
            h = h / 2;
            if (i == n - 1) {
                System.out.println(String.format("%.3f", h) + " " + String.format("%.3f", sum));
            }
            //计算球总高度
            sum += h;
        }
        //write your code here......


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


    }
}