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......
        

        //输出格式为：System.out.println(String.format("%.3f", h)+" "+String.format("%.3f", sum));
        float sum = 0F;//记录第n次落地时共经过了多少米
        for (int i = 1; i <= n; i++) {
            if (i == 1) {
                sum += h;
            } else {
                sum += h * 2;
            }
            h /= 2;
        }
        System.out.println(String.format("%.3f", h) + " " + String.format("%.3f", sum));

    }
}