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();
        float sum=h;
        while(n>1){
            h/=2;
            sum+=2*h;
            n--;
        }
        h/=2;
        // sum+=h;
        System.out.println(String.format("%.3f",h)+" "+String.format("%.3f",sum));
    }
}