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;
        h = h/2;

        //write your code here......
        for(int i=2; i<=n; i++){
            sum = sum + h*2;
            h = h/2;
        }
      
        //输出格式为：System.out.println(String.format("%.3f", h)+" "+String.format("%.3f", sum));
        System.out.println(String.format("%.3f", h)+" "+String.format("%.3f", sum));

    }
}