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);
        double  h=scanner.nextDouble();
        int n =scanner.nextInt();
        double  box=h,sum=h;
        for(int i=1;i<n;i++)
        { 
            box=box/2.0;
            sum+=box*2;
        }
        System.out.printf("%.3f %.3f",box/2.0,sum);
    }
}