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;
        float git = h;
        for (int i = 1; i <= n; i++){
            sum += 2 * h;
            h = h / 2;
        }
        sum -= git;
        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));
        

    }
}